What is the solution to the following system of equations?

x − 4y = 6
2x + 2y = 12

answer choices
(0,10)
(10,0)
(6,0)
(0,6)

Answers

Answer 1

Answer:

The answer to your question is (6, 0)

Step-by-step explanation:

Solve the system of equations by elimination

                                  x -  4y = 6             (I)

                                2x + 2y = 12            (II)

Multiply (II) by 2

                                  x  - 4y =   6

                                4x + 4y = 24

Simplify

                                5x  + 0  = 30

Find x

                                5x = 30

                                  x = 30/ 5

                                  x = 6

Find "y"

                              6 - 4y = 6

                              -4y = 6 - 6

                              -4y = 0

                                 y = 0/-4

                                 y = 0

Answer 2

Answer:

(6,0)

Step-by-step explanation:

Given equations are:

\[x - 4y = 6\]         -------------------- (1)

\[2x + 2y = 12\]    -------------------- (2)

Multiplying (1) by 2 :

\[2x - 8y = 12\]     -------------------- (3)

Calculating (2) - (3) :

\[2x + 2y -2x + 8y = 12 - 12\]

=> \[10y =0\]

=> \[y = 0\]

Substituting the value of y in (1):

\[ x  = 6 \]

So the required solution of the system of equations is x=6,y=0. This can be alternatively expressed in coordinate notation as (6,0).


Related Questions

What percent of 71 is 90?
of 71 is 90.

Answers

Answer: 126.76056338%

Step-by-step explanation: To answer the question what percent of 71 is 90, we translate the question into an equation.

We have "what percent" which we can represent by the variable X. Next we have "of 71" which means "times 71" and "is 90" means "equals 90."

Now to solve for x, since x is being multiplied by 71, we need to divide by 71 on both sides of the equation.

On the left side of the equation the 71's cancel and we have x. On the right side of the equation we have 90 divided by 71 which is 1.2676056338.

Now, remember that we want to write our answer as a percent. To write 1.2676056338 as a percent, we move the decimal point two places to the right and we get 126.76056338%.

Answer:

78.89%

Step-by-step explanation:

A banana farm received a total of 271 millimeters of rain in March and April. If 118 millimeters of rain fell on the farm in March, how many millimeters of rain fell on the farm in April

Answers

Final answer:

The amount of rain that fell on the banana farm in April is 153 millimeters.

Explanation:

To find the amount of rain that fell on the banana farm in April, subtract the amount of rain that fell in March from the total rainfall. The total rainfall in March and April is 271 millimeters, and the amount of rain that fell in March is 118 millimeters. So, the amount of rain that fell in April is 271 millimeters - 118 millimeters = 153 millimeters.

If 2/5 cup of coconut shavings covers 1/4 of a cake, then how much coconut shavings are needed for one cake? A. 3/5 cup B. 5/8 cup C. 1 3/5 cup D. 10 cups

Answers

The right answer is Option C.

Step-by-step explanation:

Given,

2/5 cup of coconut shavings covers 1/4 of a cake,

[tex]\frac{2}{5}\ coconut\ shavings=\frac{1}{4}\ of\ cake[/tex]

For one whole cake, we will multiply both sides with 4;

[tex]4*\frac{2}{5}=\frac{1}{4}*4\\\frac{8}{5} = 1\ cake[/tex]

Writing in simplified fraction form;

[tex]1\ cake = 1\frac{3}{5}\ cups[/tex]

The right answer is Option C.

Keywords: fractions, multiplication

Learn more about fractions at:

brainly.com/question/3617539brainly.com/question/3638399

#LearnwithBrainly

Use the formula to find the length of the radius if the area is 25 square centimeters.

Round your final answer to the nearest tenth of a centimeter. [tex]\sqrt{\frac{a}{\pi }[/tex]

A circle has radius r. The area of this circle can be found using the formula
[tex]A=\pi r^{2}[/tex]

Answers

Answer:r = 2.81 centimeters

Step-by-step explanation:

The area of this circle can be found using the formula

A=πr^2

Where r = radius of the circle

π is a constant whose value is 3.14

We are given the area of the circle to be 25 square centimeters. To determine the length of the radius of the circle , we will make r the subject of the formula

r^2 = A/π

Taking square root of both sides of the equation,

r = √A/π

Since A = 25 and π = 3.14,

r= √25/3.14

r = 2.82166323992

Approximating to the nearest tenth of a centimeter,

r = 2.81 centimeters

A belt runs a pulley of radius 8 inches at 60 revolutions per minute. a) Find the angular speed in radians per minute. b) Find the linear speed in inches per minute.

Answers

Answer:

Part a) [tex]120\pi\ \frac{rad}{min}[/tex]

Part b) [tex]960\pi\ \frac{in}{min}[/tex]

Step-by-step explanation:

we have

60 rev/min

Part a) Find the angular speed in radians per minute

we know that

One revolution represent 2π radians (complete circle)

so

[tex]1\ rev=2\pi \ rad[/tex]

To convert rev to rad, multiply by 2π

[tex]60\ \frac{rev}{min}=60(2\pi)=120\pi\ \frac{rad}{min}[/tex]

Part b) Find the linear speed in inches per minute

we know that

The circumference of a circle is equal to

[tex]C=2\pi r[/tex]

we have

[tex]r=8\ in[/tex] ----> given problem

substitute

[tex]C=2\pi(8)[/tex]

[tex]C=16\pi\ in[/tex]

Remember that

One revolution subtends a length equal to the circumference of the circle

so

[tex]1\ rev=16\pi\ in[/tex]

To convert rev to in, multiply by 16π

[tex]60\ \frac{rev}{min}=60(16\pi)=960\pi\ \frac{in}{min}[/tex]

Final answer:

The angular speed of the pulley is 120π radians per minute, and the linear speed is 960π inches per minute.

Explanation:

The question pertains to angular and linear speeds related to circular motion. Given that a belt runs a pulley with a radius of 8 inches at 60 revolutions per minute (rpm), we are tasked with finding both the angular speed in radians per minute and the linear speed in inches per minute.

Calculating the Angular Speed

The angular speed (ω) in radians per minute can be calculated using the formula ω = 2π×rpm, where rpm is the number of revolutions per minute and 2π radians is the equivalent of one full revolution.

ω = 2π × 60 = 120π radians/minute

Calculating the Linear Speed

The linear speed (v) can be determined from the radius (r) and angular speed (ω) using the formula v = r×ω. The radius of the pulley is 8 inches, so:

v = 8 inches × 120π radians/minute = 960π inches/minute

A rectangular piece of sheet metal has a length that is 10 10 in. less than twice the width. A square piece 5 5 in. on a side is cut from each corner. The sides are then turned up to form an uncovered box of volume 1210 1210 in. cubed in.3 Find the length and width of the original piece of metal.

Answers

Answer:

length: 32 inwidth: 21 in

Step-by-step explanation:

If the width of the original piece of sheet metal is x, then the length is 2x-10. Subtracting a 5" square from each corner makes the bottom of the box have dimensions (x-10) and (2x-20). The volume of the box is then ...

  5(x -10)(2x -20) = 1210 . . . . . . volume is the product of the dimensions

  10(x -10)² = 1210 = 10(11²) . . . . factor the equation

  (x -10)² = 11² . . . . . . . . divide by 10

  x = 11 + 10 = 21 . . . . . .take the square root, add 10

The length and width of the original piece of sheet metal were 32 inches and 21 inches, respectively.

Carpetland salespersons average $8,000 per week in sales. Steve Contois, the firm’s vice president, proposes a compensation plan with new selling incentive. Steve hopes that the results of a trial selling period will enable him to conclude that the compensation plan increase the average sales per salesperson.
a. Develop the appropriate null and alternative hypotheses.
b. What is the Type I error in this situation? What are the consequences of making this error?
c. What is the Type II error in this situation? What are the consequences of making this error?

Answers

Final answer:

The appropriate null and alternative hypotheses for the situation, the consequences of Type I and Type II errors in this context.

Explanation:

a. Null Hypothesis (H0): The compensation plan does not increase the average sales per salesperson. Alternative Hypothesis (H1): The compensation plan does increase the average sales per salesperson.

b. Type I error occurs when the null hypothesis is rejected, but it is actually true. In this situation, it means concluding that the compensation plan increases the average sales per salesperson when it does not. The consequence is that the company may implement the compensation plan and incur unnecessary costs.

c. Type II error occurs when the null hypothesis is accepted, but it is actually false. In this situation, it means concluding that the compensation plan does not increase the average sales per salesperson when it actually does. The consequence is that the company may miss out on the benefits of the compensation plan and fail to motivate its salespeople effectively.

Learn more about Hypothesis testing here:

https://brainly.com/question/34171008

#SPJ12

Joe had eight sections of the fence to paint. He painted 2/3 of each section in one hour. How many hours did it take him to paint all the sections of fence?

Answers

Answer:

1.5 hours

Step-by-step explanation:

Since Joe painted 2/3 section (2 out of 3 sections) of each section, we can break up the sections into parts of "3".

So 8 sections would have total subsections of 8 * 3 = 24 subsections

He painted 2 subsections of each of the 8 sections, so number of subsections painted would be:

8 * 2 = 16 subsections

There are more 24 - 16 = 8 more subsections to paint

If 1 hour means 16 subsections,

1/16 hour = 1 subjection

Thus,

8 remaining subsections would take:

8 * 1/16 = 8/16 = 1/2 hour

So

Initially 1 hour, then 1/2 hour, so total of 1 + 1/2 = 1.5 hours

So, to paint all sections, he took 1.5 hours

Solve for x: 5/8=x-1/9

A. 37/8
B. 23/4
C. 11/2
D. 53/8

Answers

Answer:

53/72

Step-by-step explanation:

5/8 = x - 1/9

+1/9       +1/9

5/8 + 1/9 = x

9(5/8)  + 8(1/9)

45/72 + 8/72

x= 53/72

The radius of a spherical is decreasing at a constant rate of 3 cm per second. Find, in cubic centimeters per second, the rate of change of the volume of the ball when the radius is 5cm.

Answers

Final answer:

The rate of change of the volume of a ball when the radius is 5cm is -300π cubic centimeters per second.

Explanation:

To find the rate of change of the volume of a ball, we can use the formula for the volume of a sphere, which is V = (4/3)πR³. We are given that the radius is decreasing at a constant rate of 3 cm per second. So, the rate of change of the volume can be found using the derivative of the volume function with respect to time.

First, we differentiate the volume function with respect to time:

dV/dt = (4/3)π×3R²×(-3)

dV/dt = -12πR²

Then we substitute the given value of the radius when it is 5 cm:

dV/dt = -12π×5²

dV/dt = -12π×25

dV/dt = -300π

Therefore, the rate of change of the volume of the ball when the radius is 5 cm is -300π cubic centimeters per second.

Learn more about Rate of change of volume of sphere here:

https://brainly.com/question/35811296

#SPJ12

Pattern A follows the rule "add 2" and Pattern B follows the rule "subtract 2." Pattern A: 1, 3, 5, 7, 9 Pattern B: 10, 8, 6, 4, 2 Which ordered pairs are formed from combining a term in Pattern A with its corresponding term in Pattern B? Select all correct answers. A (1, 3) B (1, 10) C (3, 6) D (5, 4) E (5, 6) F (7, 4)

Answers

Answer:

B, E, F

Step-by-step explanation:

Simply write the terms out and match them.

Final answer:

The correct ordered pairs formed from combining a term in Pattern A with its corresponding term in Pattern B are:

(1, 10), (5, 6), and (7, 4), which are Options B, E, and F, respectively.

Explanation:

The question involves creating ordered pairs from two different number patterns, Pattern A and Pattern B. To find the correct ordered pairs, we match each term in Pattern A with its corresponding term in Pattern B.

Pattern A: 1, 3, 5, 7, 9Pattern B: 10, 8, 6, 4, 2

To identify the corresponding terms, we look at the positions: the first term in Pattern A pairs with the first in Pattern B, the second with the second, and so on. Here are the resulting pairs:

(1, 10)(3, 8)(5, 6)(7, 4)(9, 2)

Based on the above matching, we evaluate the given options:

Option A: (1, 3) - Incorrect because the first term from Pattern A should be paired with the first term from Pattern B, which is 10.Option B: (1, 10) - Correct as it matches the first term in Pattern A with the first term in Pattern B.Option C: (3, 6) - Incorrect because the second term in Pattern A is 3, but the corresponding second term in Pattern B is 8, not 6.Option D: (5, 4) - Incorrect because the third term in Pattern A is 5, and the corresponding third term in Pattern B is 6, not 4.Option E: (5, 6) - Correct as it matches the third term in Pattern A with the third term in Pattern B.Option F: (7, 4) - Correct as it matches the fourth term in Pattern A with the fourth term in Pattern B.

Therefore, the correct ordered pairs when combining a term from Pattern A with its corresponding term from Pattern B are Option B, Option E, and Option F.

A box (with no top) is to be constructed from a piece of cardboard of sides A and B by cutting out squares of length h from the corners and folding up the sides. Find the value of h that maximizes the volume of the box if
A = 7 and B = 12

Answers

Answer:

 h  =   1,743

Step-by-step explanation:

Volume of a box is

V(h) =  ( A  -  2h) *  ( B  -  2h)* h              A  =  7     B  =  12

We have

V(h) = ( 7  -  2h)  *  ( 12  -  2h ) * h

V(h)  = ( 84  -  14*h  -  24*h  + 4*h² )  * h

V(h)  =  ( 84 -  38*h  + 4 *h² ) * h     ⇒  V(h)  =  84h - 38h² + 4h³

Taking derivatives both sides of the equation

V´(h)    =  84 - 76h + 12x²

V´(h)    =  0              84 - 76h + 12x² = 0     42 - 38h + 6x²

3x² - 19h   + 24  = 0

Solving for h          h1  = [  ( 19 + √(19)² - 288  ]/ 6    h1  = [ (19 + √73)/6]

h₁  =  4,59   we dismiss this value since 9,18  (4,59*2)  > A

h₂  = [ 19 - √73)/6]          h₂  =   1,743

h  =  1.743 is h value to maximizes V

Please help me with my homework and explain to me how?

Answers

Answer:

350

Step-by-step explanation:

If x is the number of hamburgers and y is the number of cheeseburgers, then:

x + y = 764

y = x + 64

Solve the system of equations with substitution or elimination.  Using substitution:

x + x + 64 = 764

2x + 64 = 764

2x = 700

x = 350

350 hamburgers were sold.

A particular type of 4th grade Achievement Test provides overall scores that are normally distributed with a mean of 50 and a standard deviation of 10.
What is the probability that a randomly selected student earns a score between 33 and 48?

Answers

Answer:

The probability that a randomly selected student earns a score between 33 and 48 is 0.3761

Step-by-step explanation:

We compute the z-score related to some value x as [tex]z=\frac{x-50}{10}[/tex]. The z-score related to 33 is given by [tex]z_{1}=\frac{33-50}{10}=-1.7[/tex] and the z-score related to 48 is given by [tex]z_{2}=\frac{48-50}{10}=-0.2[/tex]. Therefore, the probability that a randomly selected student earns a score between 33 and 48 is given by P(-1.7 < Z < -0.2) = P(Z < -0.2) - P(Z < -1.7) = 0.4207 - 0.0446 = 0.3761.

The probability is 0.3761 (a) that a student scores between 33 and 48 on the 4th grade Achievement Test.

To find the probability that a randomly selected student earns a score between 33 and 48 on the 4th grade Achievement Test, we need to use the properties of the normal distribution.

Step 1 :

**Standardize the Scores**:

  First, we need to standardize the scores using the formula for z-score:

    [tex]\[ z = \frac{x - \mu}{\sigma} \][/tex]

  where:

  - ( x ) is the score we want to find the probability for,

  - [tex]\( \mu \)[/tex] is the mean (50 in this case),

  - [tex]\( \sigma \)[/tex] is the standard deviation (10 in this case).

  For the lower score [tex]\( x = 33 \)[/tex]:

  [tex]\[ z_{\text{lower}} = \frac{33 - 50}{10} = -1.7 \][/tex]

  For the upper score [tex]\( x = 48 \)[/tex]:

  [tex]\[ z_{\text{upper}} = \frac{48 - 50}{10} = -0.2 \][/tex]

Step 2:

**Find the Probability**:

  Once we have the standardized scores, we can use a standard normal distribution table or a calculator to find the probabilities associated with these z-scores.

  From the z-table or calculator, we find:

  - For [tex]\( z_{\text{lower}} = -1.7 \)[/tex], the corresponding probability is approximately 0.0446.

  - For [tex]\( z_{\text{upper}} = -0.2 \)[/tex], the corresponding probability is approximately 0.4207.

Step 3 :

**Calculate the Probability Between the Scores**:

  To find the probability between the two scores, we subtract the probability corresponding to the lower score from the probability corresponding to the upper score:

   [tex]\[ \text{Probability} = \text{Probability}(x < 48) - \text{Probability}(x < 33) \][/tex]

   [tex]\[ \text{Probability} = 0.4207 - 0.0446 \][/tex]

   [tex]\[ \text{Probability} = 0.3761 \][/tex]

So, the correct option is: a) .3761

Complete Question :

A particular type of 4th grade Achievement Test provides overall scores that are normally distributed with a mean of 50 and a standard deviation of 10.                                                                                                           What is the probability that a randomly selected student earns a score between 33 and 48?

a) .3761

b) .4207

c) .4653

d) .0446

The radius of a circular disk is given as 25 cm with a maximal error in measurement of 0.3 cm. Use differentials to estimate the following. (a) The maximum error in the calculated area of the disk. (b) The relative maximum error. (c) The percentage error in that case.

Answers

Answer with Step-by-step explanation:

We are given  that

Radius of circular disk=r=25 cm

Maximal error in measurement of radius =[tex]\Delta r=[/tex]0.3

We know that

Surface area of circle =A=[tex]\pi r^2[/tex]

Differentiate w.r.t r

a.Maximum error=[tex]dA=2\pi rdr[/tex]

Substitute the values then we get

[tex]dA=2\times 3.14\times 25\times 0.3=47.1 cm^2[/tex]

Hence, the maximum error in area of disk=[tex]47.1 cm^2[/tex]

b.

Relative error in A: [tex]\frac{\Delta A}{A}=\frac{2\pi r\Delta r}{\pi r^2}[/tex]

Substitute the value in the formula

Then ,we get

Relative maximal error in area of disk=[tex]\frac{2\cdot 25}{(25)^2}(0.3)=0.024[/tex]

Hence, the relative maximum error in area  of disk=0.024

c.Relative error  percentage in area of disk=[tex]\frac{\Delta A}{A}\times 100[/tex]

Substitute the values then we get

Relative error  percentage in area of disk=[tex]0.024\times 100=2.4[/tex]%

Hence, the percentage error in area of disk=2.4%

Final answer:

To estimate the maximum error in the calculated area of a disk, use differentials. The maximum error in the area is approximately 15π cm². The relative maximum error is 0.24 and the percentage error is 24%.

Explanation:

To estimate the maximum error in the calculated area of the disk, we can use differentials. The formula for the area of a disk is A = πr², where r is the radius. Taking the differential of this equation gives dA = 2πr dr. Since the maximum error in the radius is 0.3 cm, we substitute dr = 0.3 cm into the equation to find the maximum error in the area. Thus, the maximum error in the calculated area of the disk is approximately 2π(25 cm)(0.3 cm) = 15π cm².

The relative maximum error is the ratio of the maximum error in the area to the actual area. Therefore, the relative maximum error can be calculated as (15π cm²) / (π(25 cm)²) = 15 / 25² = 0.24.

To calculate the percentage error, we multiply the relative maximum error by 100%.

Thus, the percentage error is 0.24 * 100% = 24%.

Learn more about Calculating the maximum error in the calculated area of a disk here:

https://brainly.com/question/15082959

#SPJ3

A certain component is critical to the operation of an electrical system and must be replaced immedi- ately upon failure. If the mean lifetime of this type of component is 100 hours and its standard devi- ation is 30 hours, how many of these components must be in stock so that the probability that the system is in continual operation for the next 2000 hours is at least .95?

Answers

Answer:

n=23

Step-by-step explanation:

Answer  explained in the attachment .

Find the missing side length

Answers

Answer:

The answer to your question is b = 148.5

Step-by-step explanation:

To solve this problem, use trigonometric functions

tan Ф = [tex]\frac{opposite side}{adjacent side}[/tex]

opposite side = b

adjacent side = 60

tan Ф = tan 68° = 2.48

Opposite side = adjacent side x tan Ф

Opposite side = 60 x 2.48

Opposite side = b = 148.5

Answer: 24.24 (24 to the nearest whole number)

Step-by-step explanation:

Following trigonometric rule,

Tan tita = opposite side/ adjacent side

Tan 68° = 60 / b

2.475 = 60 / b

By cross multiplication,

2.475b = 60

Divide both sides by 2.475

2.475b/2.475 =60/2.475

b = 24.24

Hence, adjacent side = 24.24 (24 to the nearest whole number since opposite side is in whole number).

The physical plant at the main campus of a large state university receives daily requests to replace fluorescent light bulbs. The distribution of the number of daily requests is bell-shaped and has a mean of 63 and a standard deviation of 6. Using the 68-95-99.7 rule, what is the approximate percentage of light bulb replacement requests numbering between 63 and 75? _________ % (Round your answer to the nearest tenth of a percent)

Answers

Final answer:

Approximately 81.5% of the daily light bulb replacement requests in the state university's physical plant can be expected to number between 63 and 75.

Explanation:

The question is asking for the percentage of daily light bulb replacement requests numbering between 63 and 75 at a state university's physical plant. This can be answered using the 68-95-99.7 rule, also known as the Empirical Rule, which applies to a bell-shaped distribution.

Firstly, identify that a request count of 75 is two standard deviations above the mean (63 + 6*2 = 75), because the standard deviation here is 6. According to the Empirical Rule, approximately 95% of the data lies within two standard deviations of the mean.

However, we are only interested until the upper limit of 75 and not the lower limit (63 - 6*2 = 51). Therefore, we consider half of this 95%, which gives us 47.5%. However, don't forget to include the 34% that lies within the first standard deviation (from 63 to 69). Therefore, approximately 81.5% of the light bulb replacement requests should number between 63 and 75.

Learn more about 68-95-99.7 rule here:

https://brainly.com/question/39580194

#SPJ11

the approximate percentage of light bulb replacement requests numbering between 63 and 75 is 47.5%.

Using the Empirical Rule:

Calculate the Z-scores for the given values: Z(63) = (63-63)/6 = 0 and Z(75) = (75-63)/6 = 2.Look up the percentage of data within these Z-scores: Between Z = 0 and Z = 2 is approximately 47.5%.Therefore, the approximate percentage of light bulb replacement requests numbering between 63 and 75 is 47.5%.

On the square baseball diamond shown below, the distance from first base to second base is 90 feet. How far does the catcher have to throw the ball from home plate to reach second base? Round your answer to the nearest 10th. Show your work

Answers

Answer:

  127.3 ft

Step-by-step explanation:

The diagonal of a square is √2 times the length of one side. The distance from home plate to second base is ...

  (90 ft)√2 ≈ 127.3 ft

The catcher at home has to throw the ball 127.3 ft to reach second base.

A circular cloud of poison gas from a factory explosion is expanding so that t hours after the explosion the radius of the cloud is R(t)=50+20t meters. How fast is the area of the cloud increasing 5 hours after the explosion?

Answers

Answer:

6000π m²/h

Step-by-step explanation:

Area of the circular cloud =πr²----------------------------------------- (1)

Radius as a function of time = R(t)=50+20t------------------------ (2)

dA/dt = (dA/dr) x (dr/dt)-----------------------------------------------------(3)

dA/dr  =  2πr

dr/dt   = 20

After 5 hours, the radius of the cloud will be :

R(5)=50+20(5)

     =   150 meters

Substituting into (3)

dA/dt =   2π(150)  x 20

         =   6000π m²/h

Suppose you begin a job with an annual salary of $32,900. Each year you are assured of a 5.5% raise. What its the total amount that you can earn in 15 years? A) $34,815 B) $51,751 C) $737,245 D) $1,682,920

Answers

Answer: The correct option is C

Step-by-step explanation:

You begin a job with an annual salary of $32,900

Each year you are assured of a 5.5%. If you get the same amount each year, that is a 100% payment. It is neither reducing nor increasing. But with an increase of 5.5% each year, it means you are getting (100+5.5)% each year. This equals 105.5%. So for each year, you get 105.5% of the previous year.

This is a geometric progression. To determine the total amount that you can earn in 15 years, we will find the sum of 15 terms, S15 of the series. The formula for sum of the nth term of a geometric progression is expressed as

Sn = [a(r^n - 1)] / r - 1

Where

Sn = sum of the nth terms of the series

a = the first term(salary of the first year

r = common ratio

n = number of years.

From the question,

a = 32900

n = 15

r = 105.5/100 = 1.055

S15 = [32900(1.055^15 - 1)] / 1.055 - 1

S15 = [32900(2.23247649224 - 1)] / 0.055

S15 = [32900 × 1.23247649224] / 0.055

S15 = $737245

Dullco Manufacturing claims that its alkaline batteries last at least 40 hours on average in a certain type of portable CD player. But tests on a random sample of 18 batteries from a day's large production run showed a mean battery life of 37.8 hours with a standard deviation of 5.4 hours. To test DullCo's hypothesis, the test statistic is:
Select one:
a. -2.101
b. -1.980
c. -1.960
d. -1.728

Answers

Answer:

lyrics d  - 1.782

Step-by-step explanation:

Assume Normal Distribution

we have  μ₀ = 40       (from Dullco claims)

And from sample   μ  = 37.8    and standard deviation of  5.4

random sample n = 18

We have to use t-student for testing the hypothesis

and we have a one tail test (left) since Dullco claims : " at least"  meaning (always bigger or at least ) not different.

Then

t (s) =( μ -  μ₀) / (σ/√n)   ⇒ t (s) = [(37.8  - 40 )* √18 ]/5.4

t (s) = - 1.7284

Using the t-distribution, as we have the standard deviation for the sample, it is found that the test statistic is given by:

d. -1.728

What are the hypothesis tested?

At the null hypothesis, it is tested if the batteries last at least 40 hours, that is:

[tex]H_0: \mu \geq 40[/tex]

At the alternative hypothesis, it is tested if they last less than 40 hours, that is:

[tex]H_1: \mu < 40[/tex]

What is the test statistic?

The test statistic is given by:

[tex]t = \frac{\overline{x} - \mu}{\frac{s}{\sqrt{n}}}[/tex]

The parameters are:

[tex]\overline{x}[/tex] is the sample mean.[tex]\mu[/tex] is the value tested at the null hypothesis.s is the standard deviation of the sample.n is the sample size.

In this problem, the parameters are given by:

[tex]\overline{x} = 37.8, \mu = 40, s = 5.4, n = 18[/tex]

Hence:

[tex]t = \frac{\overline{x} - \mu}{\frac{s}{\sqrt{n}}}[/tex]

[tex]t = \frac{37.8 - 40}{\frac{5.4}{\sqrt{18}}}[/tex]

[tex]t = -1.728[/tex]

Hence option d is correct.

To learn more about the t-distribution, you can check https://brainly.com/question/16313918

Help please I really need help I need it right now show work please

Answers

Answer:

ok with whuth do you need help with

Answer:

The right answer for question 1 is b)  -14

Step-by-step explanation:

Since it's a decline, the amount will be negative.

your second question is not clear in the image

3.5 per day for 4 days so multiply 3.5 by 4, which equals: $14

so the overall change is -$14.00

help me figure out this problem!!

Answers

Answer:

  4.47 years

Step-by-step explanation:

Fill in the given value of P and solve for t.

  15390 = 19000·0.954^t

  15390/19000 = 0.954^t

Taking logarithms ...

  log(1539/1900) = t·log(0.954)

  t = log(1539/1900)/log(0.954) ≈ 4.47 . . . years

How does the graph of g(x) = (x − 1)3 + 5 compare to the parent function f(x) = x3?

g(x) is shifted 1 unit to the right and 5 units up.
g(x) is shifted 5 units to the right and 1 unit up.
g(x) is shifted 1 unit to the left and 5 units up.
g(x) is shifted 5 units to the right and 1 unit down.

Answers

Answer:

A

Step-by-step explanation:

Given:

- The original function is:

                               f(x) = x^3

Find:

How does the graph of g(x) = (x − 1)3 + 5 compare to the original function.

Solution:

- We have a general form of the new function relating to parent function.

                               g(x) = a*( x +/- b )^n + c

Where; a, b and c are constants.

- The constant a magnitude denotes steepness of the graph relative to 1 and the sign of a will determine the mirror image of the graph about line y = 0.

- The constant b magnitude denotes shifts of the graph of every x value sign of b will determine the direction of shifts. + b : shift left , - b shift right.

- The constant c magnitude denotes shifts of the graph of every y value. sign of c will determine the direction of shifts. + c : shift up , - b shift down.

- In our g(x).   a = 1 , b = -1 , c = + 5

Hence, g(x) is shifted 1 unit to the right and 5 units up.

Final answer:

The graph of g(x) = (x - 1)^3 + 5 is shifted 1 unit to the right and 5 units up compared to the parent function f(x) = x^3.

Explanation:

The graph of g(x) = (x - 1)3 + 5 is obtained by shifting the graph of f(x) = x3 one unit to the right and five units up. Shifting a function horizontally is done by replacing x with (x - h), where h is the amount of units you want to shift.

In this case, g(x) = (x - 1)3 + 5 is equivalent to f(x - 1) + 5. So the graph is shifted 1 unit to the right. Shifting a function vertically is done by replacing f(x) with f(x) + k, where k is the amount of units you want to shift.

Since f(x - 1) + 5 is obtained by shifting f(x) one unit to the right and five units up, the correct answer is: g(x) is shifted 1 unit to the right and 5 units up.

Learn more about Graph Shifts here:

https://brainly.com/question/1250433

#SPJ11

On October 1, 2014, Hess Company places a new asset into service. The cost of the asset is $80,000 with an estimated 5-year life and $20,000 salvage value at the end of its useful life. What is the book value of the plant asset on the December 31, 2015, balance sheet assuming that Hess Company uses the double-declining-balance method of depreciation?

Answers

Answer:

$43,200

Step-by-step explanation:

Data provided in the question:

Cost of the asset = $80,000

Useful life of the machine = 5 years

Salvage value at the end of useful life = $20,000

Now,

Using the double declining method of depreciation

Annual depreciation rate = 2 ×  [1 ÷ useful life ]

= 2 × [ 1 ÷ 5 ]

= 2 × 0.2

= 0.4 or 40%

thus,

The depreciation from October 1, 2014 to December 31, 2014

= Annual Depreciation rate × duration × Book value for 2014

= 0.4 × 3 months × $80,000

= 0.4 × 0.25 year × $80,000

= $8,000

Book value for 2015

= Cost - depreciation till December 31, 2014

= $80,000 - $8,000

= $72,000

Therefore,

Depreciation for the year 2015

= Annual Depreciation rate  × Book value for 2015

= 0.4 × $72,000

= $28,800

Therefore,

the  book value of the plant asset on the December 31, 2015

= Book value for 2015 - Depreciation for the year 2015

= $72,000 - $28,800

= $43,200

Yesterday evening, Emily's journey home took 25% longer than usual, as she was stuck in a traffic jam. By what percentage was her average speed reduced compared to normal

Answers

Answer:

  20%

Step-by-step explanation:

Time and speed are inversely proportional, so if Emily's time was 5/4 of normal, her speed was 4/5 of normal, or 1/5 = 20% below normal.

The equation d=11cos(8pi/5 t) models the horizontal distance, d, in inches of the pendulum of a grandfather clock from the center as it swings from right to left and left to right as a function of time, t, in seconds. According to the model, how long does it take for the pendulum to swing from its rightmost position to its leftmost position and back again? Assume that right of center is a positive distance and left of center is a negative distance. A. 0.625 seconds B. 0.8 seconds C. 1.25 seconds D. 1.6 seconds

Answers

Answer:

The time it takes for the pendulum to swing from its rightmost position to its leftmost position and back again is 1.25 seconds.

Step-by-step explanation:

Given the equation

[tex]d = 11cos( \frac{8\pi}{5}*t)[/tex]-----------Equation 1

where d, in inches of the pendulum of a grandfather clock from the center.

Comparing with the standard equation of an oscillating pendulum bob.

[tex]d = Acos (wt + \alpha )[/tex] ----------Equation 2

         where ω =  angular velocity

                     t =  time taken

                     α =  The angular displacement when t = 0

Comparing equation 1 and 2,

α = 0

[tex]w =\frac{8\pi }{5}[/tex]

Recall that [tex]w = 2\pi f

Therefore,

[tex]2\pi f = \frac{8\pi }{5} \\\\f = \frac{4}{5}[/tex][/tex]

f = 0.8 Hertz

Recall that [tex]f = \frac{1}{T}[/tex]

[tex]T = \frac{1}{0.8}[/tex]

T = 1.25 seconds

Therefore, the time it takes for the pendulum to swing from its rightmost position to its leftmost position and back again is 1.25 seconds.

Suppose you perform an ANOVA on 18 subjects divided evenly into three groups according to age. Reading speed is measured and averaged for each of the three groups. The reading speed for the Young Group is 10; for the Middle Group, 12; and for the Older Group, 13. Your F-obtained is 9.15. This is a significant F-obtained. Which of the following is the correct way to report this finding? A. The Older Group reads significantly faster than any other group. B. The Young Group reads significantly faster than any other group. C. There is a significant difference between the Older Group and the Middle Group. D. There is a significant difference among the reading speeds somewhere.

Answers

Answer:

D. There is a significant difference among the reading speeds somewhere.

Hope this helps!

Choose the word or phrase that completes each sentence. helps businesses allocate resources for their best and most productive uses. The more a resource, the more costly it will be. A manufacturer that requires scarce and costly resources is likely to charge for its products.

Answers

Answer:

1. Value helps businesses allocate resources for their best and most productive uses.

2. The more Scarce a resource, the more costly it will be.

3. A manufacturer that requires scarce and costly resources is likely to charge more for its products.

Step-by-step explanation:

Given:

Three sentences are given we need to add a word or phrase to complete it

First Sentence:

helps businesses allocate resources for their best and most productive uses.

It the above sentence Value will be the word which will complete the sentence because when a resource is valued for his work he provides his best in his work and can be assured as productive too.

Hence  we can say,

Value helps businesses allocate resources for their best and most productive uses.

Second Sentence:

The more a resource, the more costly it will be.

It the above sentence Scarce will be the word which will complete the sentence because Scarce Resource always considered to be more costly.

Hence we can say;

The more Scarce a resource, the more costly it will be.

Third Sentence.

A manufacturer that requires scarce and costly resources is likely to charge for its products.

It the above sentence more will be the word which will complete the sentence because A manufacture who has Scarce and costly resource is said to have less production and hence its product would be more costly too.

Hence we can say;

A manufacturer that requires scarce and costly resources is likely to charge more for its products.

Answer:  Value, scarce , more

Step-by-step explanation:

those are correct

Other Questions
A 1.00 * 10^-6 -g sample of nobelium, 254/102 No, has a half-life of 55 seconds after it is formed. What is the percentage of 254/102 No remaining at the following times?a) 5.0 min after it formsb) 1.0 h after it forms A parallel plate capacitor is connected to a battery that maintains a constant potential difference between the plates. If the plates are pulled away from each other, increasing their separation, what happens to the amount of charge on the plates?a. The amount of the charge decreases, because the capacitance increases.b. Nothing happens; the amount of charge stays the same.c. The amount of the charge increases, because the capacitance increases.d. The amount of the charge increases, because the capacitance decreases.e. The amount of the charge decreases, because the capacitance decreases. act 2, scene 1, of The Tragedy ofWhich piece of evidence best supports the theme that powercan corrupt people?"lowliness is young ambition's ladder, / Whereto theclimber-upward turns his face""scorning the base degrees / By which he did ascend""I have not known when his affections swayed / Morethan his reason""the quarrel / Will bear no colour for the thing he is"rak truth of Caesar,n his affections swayedBut 'tis a common proofig ambition's ladder,upward turns his face;ains the upmost round,er turns his back,corning the base degreesnd. So Caesar may.vent. And since the quarrelthe thing he is,that he is, augmented,d these extremities;mas a serpent's eggdas his kind grow mischievous, What is the value of 3/y if y = 1 2/3? The ________ phase is a technical blueprint for a whole system which captures all aspects of how the system's components will function together to accomplish goals, using descriptions, diagrams, and models. How many reactants and products are present in a double-replacement reaction?one reactant and two productsone reactant and one producttwo reactants and two productstwo reactants and one product From the equation, find the axis of symmetry of the parabola.y = x^2+ 3x + 1A. X= 3/2B. Y= 1C. X=3 D. X= -3/2 Complete the following sentences. 1. establish goals for the companys sales and production personnel. 2. The is a set of interrelated budgets that constitutes a plan of action for a specified time period. 3. reduces the risk of having unrealistic budgets. 4. include the cash budget and the budgeted balance sheet. 5. The budget is formed within the framework of a . 6. contain considerably less detail than budgets. how will the indigenous people begin to resist european control in the 19th century? Jack: "Let's go to the movies at Cineplex after class. We have to get out of this building anyway." What type of cause is Jack implying by saying they "have to" leave the building?A. Cause as necessary condition. B. Cause as sufficient condition. C. Cause as necessary and sufficient condition. D. Contributory cause. Primary cause. E. None of the above. Assume that you react 100 mg of benzoic acid with 10 mL of methanol and 10 microliters of sulfuric acid to produce methyl benzoate. Write a balance chemical equation for this reaction. Determine the limiting reagent and calculate a theoretical yield of both the ester and water. If you isolate 75 mg of methyl benzoate, what is the actual yield of the reaction? Darius is a college student who plays video games every night for entertainment. Most of the games he enjoys portray women as weak and helpless and men as strong and independent. What does research suggest we can assume about Darius? Many of Joe's signs and symptoms can be related to the loss of glucose in his urine. Normally, urine does not contain glucose. When plasma glucose levels are elevated, however, some of the glucose from the plasma passes into the urine. Apply the principle of osmosis to explain why Joe was getting up all night to use the bathroom and why he has low blood pressure and signs of dehydration.Choose the most accurate explanation for Joe's problem.A. The frequent urination is happening because the urine contains a large volume of glucose. The loss of glucose from his plasma has decreased his blood volume.B. The frequent urination is happening as part of a feedback loop to regulate his blood volume. It does not have anything to do with his plasma glucose.C. The frequent urination is happening because his kidneys have stopped working. The kidney failure leads to low blood pressure.D. The frequent urination is happening because when glucose moved into his urine, water also followed it. This removed water from his plasma, decreasing his blood volume and dehydrating him. A 46-year-old man is currently enrolled in a Phase I study of a drug for severe diabetic neuropathy. While the study is on going, a new drug becomes commercially available that may have equal or greater benefit to the subject. The investigator should do which of the following?A) Tell the subject about the new drug but discourage him from switching treatments until the study is completed.B) Withhold this new information to avoid confusing the subject with other treatment options or alternatives.C) Give the subject comprehensive information about the new drug, including its side effects. Discuss the pros and cons of both the investigational drug and the commercially available drug and then allow the subject to decide whether to withdraw from the research to take the new drug.D) Do not tell the subject about the new drug since phycians have the right to try out new treatments with their patients. Why did Tecumseh disagree with Americansettlers about who owned the land? En la brjula cual ser la direccin opuesto a sudeste? an element is a mixture of two isotopes. one isotope has an atomic mass of 34.96885 amu and has an abundance of 75.53%. The other isotope has an atomic mass of 36.96590 amu. Calculate the average atomic mass and identify the element? Please help!!Evaluate:1. 5x(x-2)-2x^2 for x=-22. 2x^2-5x+8 for x=3 Achieving the goal of price stability with low and steady inflation allows the Fed to achieve other goals, such as stable interest rates and stable foreign exchange rates. If the Fed fails to achieve low and steady inflation, why will it be hard to achieve stable interest rates? A. Because the real interest rate includes an inflation premium. B. Because high inflation leads to tremendous decreases of nominal interest rates. C. Because low inflation leads to tremendous increases of nominal interest rates. D. Because the nominal interest rate includes an inflation premium. What were Hitlers foreign policy aims?