In circle O, the radius is 4, and the
measure of minor arc AB is 120
degrees. Find the length of minor
arc AB to the nearest integer.

Answers

Answer 1

Answer:

The length of minor arc AB is 8

Step-by-step explanation:

In this question, we are asked to calculate the length of the minor arc.

Mathematically, the length of an arc can be calculated using the formula below;

Length of an arc = θ/360° × 2πr

Where θ is the angle subtended by the arc which is 120° according to the question, r is the radius of the circle which is 4 according to the question.

Plugging these values, we have

Length of minor arc AB = 120/360 × 2 × 22/7 × 4 = 8.34 = 8 to the nearest integer

Answer 2
Final answer:

The length of the minor arc AB in circle O with a radius of 4 and a central angle of 120 degrees, rounded to the nearest integer, is 8 units.

Explanation:

In the context of circle geometry, the length of a minor arc can be calculated by using the formula: arc length = (central angle/360) x (2π x radius). Given in the problem, we have a radius of 4 units and a minor arc with a measure of 120 degrees. Substituting the given values into the formula, the arc length becomes (120/360) x (2π x 4) which simplifies to (1/3) x (8π) = 8π/3 units.

However, the question asks for the minor arc length to the nearest integer. In this case, you would calculate 8π/3 which approximately equals 8.37758, but when rounded to the nearest integer, it would be 8.

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Related Questions

Write a quadratic function whose graph has a vertex of (3, 2) and passes through the point (4, 7), using f(x) = a(x - h)^2 + k (vertex form).
THANK YOU FOR HELPING!!!

Answers

The quadratic function is f(x) = 5(x - 3)² + 2.

What is a function?

A function has an input and an output.

A function can be one-to-one or onto-one.

It simply indicated the relationships between the input and the output.

Example:

f(x) = 2x + 1

f(1) = 2 + 1 = 3

f(2) = 2 x 2 + 1 = 4 + 1 = 5

The outputs of the functions are 3 and 5

The inputs of the function are 1 and 2.

We have,

The vertex form of a quadratic function is:

f(x) = a(x - h)² + k

where (h, k) is the vertex of the parabola.

We are given that the vertex is (3, 2), so we have:

h = 3

k = 2

We also know that the parabola passes through the point (4, 7).

We can use this point to find the value of a:

7 = a(4 - 3)² + 2

5 = a

Therefore, the quadratic function is:

f(x) = 5(x - 3)² + 2

This quadratic function has a vertex of (3, 2) and passes through the point (4, 7).

Thus,

The quadratic function is f(x) = 5(x - 3)² + 2.

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Verify the identity. StartFraction sine (alpha plus beta )Over cosine alpha cosine beta EndFraction equals tangent alpha plus tangent beta Rewrite the numerator on the left side of the identity using one of the sum and difference formulas. StartFraction nothing Over cosine alpha cosine beta EndFraction Rewrite the fraction from the previous step such that it is a sum or difference of two expressions. Do not simplify the result. nothing Divide out any common factors in the expression from the previous step. nothing The expression from the previous step then simplifies to tangent alpha plus tangent beta using​ what? A. Quotient Identity B. Reciprocal Identity C. ​Even-Odd Identity D. Pythagorean Identity

Answers

Answer:

(A)Quotient Identity

Step-by-step explanation:

To Prove: [tex]\dfrac{\sin \left(\alpha +\beta \right)}{\cos \left(\alpha +\beta \right)}=\tan \left(\alpha +\beta \right)[/tex]

Rewrite the numerator on the left side of the identity using the sum and difference formulas.

[tex]\dfrac{\sin \left(\alpha +\beta \right)}{\cos \left(\alpha +\beta \right)}=\dfrac{\sin \alpha \cos \beta +\cos \alpha \sin \beta }{\cos \alpha \cos \beta -\sin \alpha \sin \beta }[/tex]

Next, Divide the numerator and denominator by[tex]cos\alpha \text{cos}\beta[/tex]

[tex]=\dfrac{\frac{\sin \alpha \cos \beta +\cos \alpha \sin \beta }{\cos \alpha \cos \beta }}{\frac{\cos \alpha \cos \beta -\sin \alpha \sin \beta }{\cos \alpha \cos \beta }}[/tex]

Rewrite the fraction from the previous step such that it is a sum or difference of two expressions as shown below

[tex]=\dfrac{\frac{\sin \alpha{\cos \beta }}{\cos \alpha{\cos \beta }}+\frac{{\cos \alpha }\sin \beta }{{\cos \alpha }\cos \beta }}{\frac{{\cos \alpha }{\cos \beta }}{{\cos \alpha }{\cos \beta }}-\frac{\sin \alpha \sin \beta }{\cos \alpha \cos \beta }}[/tex]

Divide out any common factors in the expression from the previous step.

[tex]=\dfrac{\frac{\sin \alpha }{\cos \alpha }+\frac{\sin \beta }{\cos \beta }}{1-\frac{\sin \alpha \sin \beta }{\cos \alpha \cos \beta }}[/tex]

The expression from the previous step then simplifies to [tex]\tan \left(\alpha +\beta \right)[/tex] using​ the Quotient Identity

[tex]=\dfrac{\tan \alpha +\tan \beta }{1-\tan \alpha \tan \beta }=\tan \left(\alpha +\beta \right)[/tex]

Someone please answer this will mark brainliest

Answers

B is the correct answer

Answer:

The answer to your question is the letter B.

Step-by-step explanation:

Data

        √3/2     -2π     4/5    -6.5    7 2/3

Process

1.- Get the decimal values of each data

√3/ 2= 0.87      -2π = -6.28    4/5 = 0.2    -6.5 = -6.5     7 2/3  = 7.67

2.- Order the numbers from greatest to least

            7.67 >  0.87  >  0.2  > -6.28  >  -6.5

or          7 2/3  >  √3/2  >  4/5  >  -2π  >  -6.5

3.- Conclusion

The right answer is B.

A county is considering rasing the speed limit on a road because they claim that the mean speed of vehicles is greater than 30 miles per hour. a random sample of 15 vehicles has a mean speed of 31 miles per hour and a standard deviation of 4.7 miles per hour. at alpha equals 0.10​, do you have enough evidence to support the​ county's claim? complete parts​ (a) through​ (d) below.

Answers

Answer:

No, at alpha equals 0.10​, we do not have enough evidence to support the​ county's claim.

Step-by-step explanation:

We are given that a county is considering raising the speed limit on a road because they claim that the mean speed of vehicles is greater than 30 miles per hour.

A random sample of 15 vehicles has a mean speed of 31 miles per hour and a standard deviation of 4.7 miles per hour.

Let [tex]\mu[/tex] = true mean speed of the vehicles.

SO, Null Hypothesis, [tex]H_0[/tex] : [tex]\mu \leq[/tex]  30 miles per hour   {means that the mean speed of vehicles is lesser than or equal to 30 miles per hour}

Alternate Hypothesis, [tex]H_A[/tex] : [tex]\mu[/tex] > 30 miles per hour   {means that the mean speed of vehicles is greater than 30 miles per hour}

The test statistics that will be used here is One-sample t test statistics as we don't know about the population standard deviation;

                        T.S.  = [tex]\frac{\bar X -\mu}{\frac{s}{\sqrt{n} } }[/tex]  ~ [tex]t_n_-_1[/tex]

where, [tex]\bar X[/tex] = sample mean speed of 15 vehicles = 31 mph

             s = sample standard deviation = 4.7 mph

             n = sample of vehicles = 15

So, test statistics  =   [tex]\frac{31-30}{\frac{4.7}{\sqrt{15} } }[/tex]  ~ [tex]t_1_4[/tex]

                               =  0.824

Hence, the value of test statistics is 0.824.

Now at 0.10 significance level, the t table gives critical value of 1.345 at 14 degree of freedom for right-tailed test. Since our test statistics is less than the critical value of t as 0.824 < 1.345, so we have insufficient evidence to reject our null hypothesis as it will not fall in the rejection region.

Therefore, we conclude that the mean speed of vehicles is lesser than or equal to 30 miles per hour which means that the county's claim is not supported.

f(x) goes through the point (9,2) then the function f(3x) must go through what point

Answers

Answer:

(27,2)

Step-by-step explanation:

Multiply the x value by 3 to get the transformation

If a function f(x) goes through the point (9,2), the function f(3x) will go through the point (3,2) after substituting x with 3x in the original function.

If the function f(x) passes through the point (9,2), then to determine the corresponding point that f(3x) goes through, we must substitute x with 3x in the original function.

Since we know that f(9) = 2, to find f(3x) we look for a value of x that when multiplied by 3 gives us 9.

That value is x = 3.

Therefore, f(3×3) = f(9) = 2, meaning f(3x) will go through the point (3,2).

Is this statement true or false 16% of 250 is equal to 250% of 16

Answers

16% of 250 is .16 * 250, which is 40

250% of 16 is 2.5 * 15, which is also 40

So, it's true.

A percentage is a way to describe a part of a whole. The statement that 16% of 250 is equal to 250% of 16 is true.

What are Percentages?

A percentage is a way to describe a part of a whole. such as the fraction ¼ can be described as 0.25 which is equal to 25%.

To convert a fraction to a percentage, convert the fraction to decimal form and then multiply by 100 with the '%' symbol.

The value of 16% of 250 can be written as,

[tex]16\%\ of\ 250\\\\=\dfrac{16}{100} \times 250\\\\=40[/tex]

The value of 250% of 16 can be written as,

[tex]250\%\ of\ 16\\\\=\dfrac{250}{100} \times 16\\\\=40[/tex]

Thus, the statement that 16% of 250 is equal to 250% of 16 is true.

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At a baseball game, 95% of people attending were supporting the home team, while 5% were supporting the visiting team. If the total number of people attending the game was 1000, how many people attending were supporters of the home team?

Answers

Answer:

950 people

Step-by-step explanation:

95% of people attending supported the home team.

1000 people attended the game.

That means that 95% of 1000 people supported the home team.

We need to find 95% of 1000.

To find a percent of a number, multiply the percent by the number. First, change the percent into a decimal by by moving the decimal point two places to the left. Then multiply the percent written as a decimal by the number.

95% of 1000 =

= 95% * 1000

= 0.95 * 1000

= 950

Answer: 950 people

Explain why a cross section of a polyhedron does not always match the base of that polyhedron.

Answers

Explanation:

A cross section of a prism will match the base of the prism when the plane of the section is parallel to the base.

If the polyhedron is not a prism, or the lateral faces are not perpendicular to the base, or the plane of cross section is not parallel to the base, you can get a variety of cross-section shapes.

For example, the cross sections of a cube include ...

  triangle, square, rectangle, trapezoid, general quadrilateral, pentagon, hexagon

Answer: A cross section of a prism will match the base of the prism when the plane of the section is parallel to the base.

If the polyhedron is not a prism, or the lateral faces are not perpendicular to the base, or the plane of cross section is not parallel to the base, you can get a variety of cross-section shapes.

Step-by-step explanation.

Find the probability that a randomly generated bit string of length 10 does not contain a 0 if bits are independent and if:a) a 0 bit and a 1 bit are equally likelyb) the probability that a bit is a 1 is 0.6c) the probability that the i-th bit is a 1 is 1/(2^i) for i=1,2,3,...,10

Answers

Answer:

A) 0.0009765625

B) 0.0060466176

C) 2.7756 x 10^(-17)

Step-by-step explanation:

A) This problem follows a binomial distribution. The number of successes among a fixed number of trials is; n = 10

If a 0 bit and 1 bit are equally likely, then the probability to select in 1 bit is; p = 1/2 = 0.5

Now the definition of binomial probability is given by;

P(K = x) = C(n, k)•p^(k)•(1 - p)^(n - k)

Now, we want the definition of this probability at k = 10.

Thus;

P(x = 10) = C(10,10)•0.5^(10)•(1 - 0.5)^(10 - 10)

P(x = 10) = 0.0009765625

B) here we are given that p = 0.6 while n remains 10 and k = 10

Thus;

P(x = 10) = C(10,10)•0.6^(10)•(1 - 0.6)^(10 - 10)

P(x=10) = 0.0060466176

C) we are given that;

P((x_i) = 1) = 1/(2^(i))

Where i = 1,2,3.....,n

Now, the probability for the different bits is independent, so we can use multiplication rule for independent events which gives;

P(x = 10) = P((x_1) = 1)•P((x_2) = 1)•P((x_3) = 1)••P((x_4) = 1)•P((x_5) = 1)•P((x_6) = 1)•P((x_7) = 1)•P((x_8) = 1)•P((x_9) = 1)•P((x_10) = 1)

This gives;

P(x = 10) = [1/(2^(1))]•[1/(2^(2))]•[1/(2^(3))]•[1/(2^(4))]....•[1/(2^(10))]

This gives;

P(x = 10) = [1/(2^(55))]

P(x = 10) = 2.7756 x 10^(-17)

Final answer:

To find the probability that a randomly generated bit string of length 10 does not contain a 0, we consider each scenario separately. For equally likely 0s and 1s, the probability is (0.5)^10. For a 0.6 probability of 1, the probability is (0.4)^10. For varying probabilities of 1, the probability is calculated by multiplying the probabilities for each position.

Explanation:

To find the probability that a randomly generated bit string of length 10 does not contain a 0, we need to consider each scenario separately.

a) If a 0 bit and a 1 bit are equally likely, then the probability of getting a 0 in any position is 0.5. Since the bits are independent, the probability of not getting a 0 in any of the 10 positions is (0.5)^10 = 0.00097656.

b) If the probability of a bit being a 1 is 0.6, then the probability of getting a 0 in any position is 1 - 0.6 = 0.4. Again, since the bits are independent, the probability of not getting a 0 in any of the 10 positions is (0.4)^10 = 0.00604661.

c) If the i-th bit has a probability of 1/(2^i) of being a 1, then the probability of getting a 0 in the i-th position is 1 - 1/(2^i). Multiplying the probabilities for each position gives us the probability of not getting a 0 in any of the 10 positions.

P(Not getting a 0) = (1 - 1/(2^1))(1 - 1/(2^2))(1 - 1/(2^3))(1 - 1/(2^4))(1 - 1/(2^5))(1 - 1/(2^6))(1 - 1/(2^7))(1 - 1/(2^8))(1 - 1/(2^9))(1 - 1/(2^10)) = 0.00563108.

A license plate is to consist of 5 digits followed by 5 uppercase letters. Determine the number of different license plates possible if the first and second digits must be​ odd, and repetition is not permitted.

Answers

Answer:

[tex]5.3044992\times 10^{10}[/tex]

Step-by-step explanation:

We are given that a license plate consist of 5 digits and 5 uppercase letters

Digits used=0,1,2,..9

Total number of letters=26

Repetition is not allowed

Total number of odd digits=(1,3,5,7,9)=5

The first place filled by 5

Second place filled by 4

Third place filled by 8

Fourth place filled by 7

Fifth place filled by 6

Sixth place filled by 26

Seventh place filled by 25

Eighth place filled by 24

Ninth place filled by 23

Tenth place filled by 22

Total number of possible  different license plates =[tex]5\times 4\times 8\times 7\times 6\times 26\times 25\times 24\times 23\times 22[/tex]=[tex]5.3044992\times 10^{10}[/tex]

The number of possible license plates, considering the restrictions on the first and second odd digits and no repetition, is 53,144,832,000. This was determined by systematically calculating the choices for each digit and letter and then multiplying them together.

Calculating the Number of Different License Plates

To determine the number of different license plates possible, we need to consider two sections: the digits and the letters. The first and second digits must be odd, and repetition of digits and letters is not permitted.

Step-by-Step Calculation:

→ First digit: Since it must be odd (1, 3, 5, 7, 9), there are 5 choices.

→ Second digit: Also must be odd but different from the first, so there are 4 remaining choices.

→ Third digit: Any digit except the first two, leaving 8 choices.

→ Fourth digit: Any remaining digit, leaving 7 choices.

→ Fifth digit: Any remaining digit, leaving 6 choices.

→ First letter: Any uppercase letter, 26 choices.

→ Second letter: Any remaining uppercase letter, 25 choices.

→ Third letter: Any remaining uppercase letter, 24 choices.

→ Fourth letter: Any remaining uppercase letter, 23 choices.

→ Fifth letter: Any remaining uppercase letter, 22 choices.

→ Multiply these choices together:

5 × 4 × 8 × 7 × 6 × 26 × 25 × 24 × 23 × 22

→ Calculate the total:

5 × 4 × 8 × 7 × 6 = 6720

26 × 25 × 24 × 23 × 22 = 7893600

6720 × 7893600 = 53,144,832,000

Therefore, the number of different license plates possible is 53,144,832,000.

What is the value of this expression when x = negative 1 and y = 2?

4 x cubed y squared

Answers

Answer:

the correct answer is -16

Step-by-step explanation:

I took the test

The solution for the expression 4x³y² at x = -1 and y =2 will be -16.

What is an expression?

Expression in maths is defined as the relation of numbers variables and functions by using mathematical signs like addition, subtraction, multiplication, and division.

Given that the expression is 4x³y². The values of x and y are -1 and 2.

The expression at the values of x and y will be solved as:-

E = 4x³y²

Substitute the values of x = -1 and y = 2.

E = 4x³y²

E = 4 x ( -1)³ x ( 2 )²

E = 4 x -1 x 4

E = -16

The value of the expression at x =-2 and y = 2 will be -16.

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Write the number 0.00008623 in standard form

Answers

Answer:

8.623

Step-by-step explanation:

ik it

Answer: 8.623

Step-by-step explanation: you move the decimal down 6 points left and then you get your answer

An employee’s salary for Alar Services is $37,500. Next year, she will get an 8% increase in salary. How much is her new salary

Answers

Answer:

$40,500  I took a test and this was the answer to the question.

Answer:

$40500

Step-by-step explanation:

Using the table tool, create a truth table for the compound statement ~(p^q)

Answers

Answer:

The image attach is  the truth table for the compound statement

Step-by-step explanation:

y=4x-9 what’s the missing value in the solution to the equation?

Answers

Answer:

x=2.25

Step-by-step explanation:

Let's break this down:

Saying "y=", is just like saying "0=", so we can say that;

0=4x-9

We need to isolate the variable, and to do that we should add 9 to both sides and cancel it out.

9=4x

Now we need to eliminate the coefficient by dividing both sides by four

[tex]9/4=4x/4[/tex]

Which cancels out four, giving us

2.25=x

Hope this helps and please correct me if I am wrong:)

<3

Ann wants to wallpaper the back wall of her bedroom. The wall is in the shape of a rectangle. Its length is 17 feet and its width is 13 feet. Suppose wallpaper costs $5 for each square foot. How much will wallpaper cost for the wall?

Answers

Answer:

The wallpaper would cost 1105 $

Solve the inequality below; Which direction will the graph go in and will the dot be open or closed? m+5>-1

Answers

Answer:

The dot will be closed, and to the right from -6

Step-by-step explanation:

We can rearrange [tex]m+5>-1 = -6 < m[/tex]

As it is only a < we close the dots. It must go to the left as m is greater than -6 - all numbers greater than a value will be to the right on the number line.

Olivia is cutting a 1 \dfrac12 \text{ m}1 2 1 ​ m1, start fraction, 1, divided by, 2, end fraction, start text, space, m, end text by \dfrac34\text{ m} 4 3 ​ mstart fraction, 3, divided by, 4, end fraction, start text, space, m, end text piece of rectangular paper into two pieces along its diagonal. Find the area of each of the pieces.

Answers

Answer: 9/6 metre

Step-by-step explanation:

From the question, Olivia is cutting a 1 1/2m by 3/4m piece of rectangular paper into two pieces along its diagonal

This will result into two congruent triangular pieces.  

Let us first find the area of each piece by finding the area of the original rectangle and dividing it by two.

The area of a rectangle is given by multiplying the length and the width:

1 1/2 × 3/4

We can change the first fraction to an improper fraction:

(1×2)+1 = 2+1 = 3; this gives us 3/2:

3/2 × 3/4 = 9/8 = 1 1/8

The area of the entire rectangle is 1 1/8 sq. m., or 1.125 sq. m.

Divide this by 2:

9/8 ÷ 2

9/8 × 1/2 = 9/16

The area of each rectangle is 9/16 sq. m., or 0.5625 sq.

Answer:

9/16

Step-by-step explanation:

What are the answers

Answers

Answer:

x = 1, y = 1

Step-by-step explanation:

Use system of equations to solve for x and y by using substitution

The solution to the system of equations, though we can solve using substitution, can also be found by graphing these equations. If you graph these equations, look for where they intersect (it should be one point!).

-5x + 6 = 3x - 2

6 = 8x - 2

8x = 8

x = 1

y = 3(1) - 2

y = 3 - 2

y = 1

Hope this helps!! :)

Edith needs 65 yards of yarn to knit a baby hat and 580 yards of yarn to knit a baby blanket. A ball of yarn contains 420 feet of yarn. How many balls of yarn does Edith need to buy to make the baby hat and baby blanket?

Answers

Answer:

  5

Step-by-step explanation:

There are 3 feet in a yard, so 420 feet is 420/3 = 140 yards.

The total number of yards Edith needs is ...

  65 yd + 580 yd = 645 yd

So, the total number of balls of yarn Edith needs is ...

  (645 yd)/(140 yd/ball) ≈ 4.61 balls

Edith needs to buy 5 balls of yarn to make her projects.

Hey, please answer the attachment questions. 3 questions.

Answers

Answer:

A. Cat

B. 8

C. 6 people

Step-by-step explanation:

A. Just by looking at it Cat has the least amount of squares

B. There are 10 full squares in total (including the pieces). 80 people divided by 10 boxes is 8.

C. There is 1/2 and 1/4 more people who picked giraffe more than dogs. 1

1/2 of 8 is 4. 1/4 of 8 is 2. 4+2 = 6.

Santiago receives $143 per year in simple interest from three investments. Part is invested at 2%, part at 3%, and part at 4%. There is $500 more invested at 3% than at 2%. The amount invested at 4% is three times the amount invested at 3%. Find the amount of each rate
Please answer I need a lot of help on this!!!

Answers

Answer:

02a+.03b+.04c=126,

b=a+500,

c=3b

a=300., b=800., c=2400.

Step-by-step explanation:

The amount of each rate of interest given the total simple interest received is

$400, $900 and $2,700 respectively

let

a = 2% investment

= 0.02

b = 3% investment

= 0.03

c = 4% investment

= 0.04

Total interest = (0.02×a) + (0.03×b) + (0.04×c)

143 = 0.02a + 0.03b + 0.04c (1)

b = a + 500 (2)

c = 3b (3)

substitute (3) into (1)

143 = 0.02a + 0.03b + 0.04(3b)

143 = 0.02a + 0.03b + 0.12b

0.02a + 0.15b = 143 (4)

from (2)

b - a = 500 (5)

multiply (5) by 0.02

0.02b - 0.02a = 10

0.02a + 0.15b = 143 (4)

Add

0.02b + 0.15b = 10 + 143

0.17b = 153

b = 900

substitute b into (3)

c = 3b (3)

c = 3(900)

c = 2700

Recall,

b = a + 500 (2)

900 = a + 500

900 - 500 = a

a = 400

Therefore, the amount of each rate of interest given the total simple interest received is $400, $900 and $2,700 respectively

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a box used for shipping a volleyball set measures 10 inches by 20 inches by 40 inches. what is the longest length of support pole that will fit into the box, rounded to a tenth of an inch?

Answers

Answer:

45.8 inches

Step-by-step explanation:

Considering the given dimensions and taking 40 inches for length, 20 inches for height and 10 inches for width. The diagonal that runs from bottom to top of box will give the longest possible length of a pole.

Diagonal at the bottom of box

Diagonal=√(l²+w²)

Where l and w represent length and width respectively

Diagonal=√(40²+10²)=√1700

Diagonal between the height and bottom diagonal

Longest diagonal=√(20²+√1700)=√2100=45.8257569495584

Rounded off, the diagonal is approximately 45.8 inches

Final answer:

The longest length of a support pole that will fit into the box measures approximately 45.8 inches.

Explanation:

To find the longest length of a support pole that will fit into the box, we need to determine the length of the diagonal of the box. The diagonal length can be found using the formula:

diagonal = √(length^2 + width^2 + height^2)

Substituting the given values:

diagonal = √(10^2 + 20^2 + 40^2) = √(100 + 400 + 1600) = √2100 ≈ 45.82 inches.

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If m + n = m, what is the value of n?
a. 1
b. 0
C.-1
d.not enough information to tell

Answers

Answer:

B. 0

Step-by-step explanation:

if n is anything but 0 then the answer wouldn't be m it would be for example m - 1 or m + 1

for it to remain m then n must be 0

Alice, Betty and Carol all have the same amount of money (more than 50 cents but less than a dollar). Alice has two coins, Betty and Carol each have 3 coins, but Betty and Carol do not have any coins that are the same. How much money does each girl have?

Answers

Answer:

Each girl has 60 cents.

Step-by-step explanation:

Since they have between 50 cents and 1 dollar, then Alice should have a 50 cent coin and 1 coin of less value (because if she had 2 coins that are worth 25 cents or less, she would have only 50 cents at most).

On the other hand, Both betty and carol need to have a coin that is at least 25 cents worth (because otherwise they would have 30 cents at most), but since they cant have the same coins, then one of them should have one 50 cent coin (and 2 small cent coins) and the other should have at least two twenty five cent coins.

Lets assume that Betty has a 50 cent coin and Carol has two 25 cent coins. Since Alice also has a 50 cent coin, then the remaining coin of Alice should have the same value than the sum of the remaining 2 coins that Betty has.

The values of the coins are 5,10, 25, 50, and 100. Since they cant have 1 dollar coins, then the only possibility for a coin to have the sum of the values of 2 coins is to have a value of 10 (10 = 5+5). Thus:

Alice has one coin of 50 cents and one coin of 10 centsBetty has one coin of 50 cents and two coins of 5 centsCarol has two coins of 25 cents and one coin of 10 cents

Each girl has 50+10 = 50+5+5=25+25+10 = 60 cents

Which is a y-intercept of the continuous function in the table? (5, 0) (0, 1) (0, 5) (1, 0)

Answers

Final answer:

The possible y-intercepts for the given continuous function from the table are (0,1) and (0,5).

Explanation:

In this mathematical problem, the student is asking about the y-intercept of a function represented in a table. The y-intercept of a continuous function is a point where the line of the function intersects or touches the y-axis on a graph. This point is always (0, y). If we look at the given points, only (0,1) and (0,5) can potentially be y-intercepts because they have 0 as their x-coordinate, which is the requirement for a point to be a y-intercept.

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A shipping firm suspects that the mean life of a certain brand of tire used by its trucks is less than 38,000 miles. To check the claim, the firm randomly selects and tests 18 of these tires and gets a mean lifetime of 37,300 miles with a standard deviation of 1000 miles. At α= 0.05, does the test suggest that mean life is less than 39000 miles?

Answers

Answer:

[tex]t=\frac{37300-38000}{\frac{1000}{\sqrt{18}}}=-2.970[/tex]  

[tex]p_v =P(t_{17}<-2.97)=0.0043[/tex]  

If we compare the p value and the significance level given [tex]\alpha=0.05[/tex] we see that [tex]p_v<\alpha[/tex] so we can conclude that we have enough evidence to reject the null hypothesis, so we can conclude that the true mean is lower than 38000 at 5% of signficance.  

Step-by-step explanation:

We assume this question: A shipping firm suspects that the mean life of a certain brand of tire used by its trucks is less than 38,000 miles. To check the claim, the firm randomly selects and tests 18 of these tires and gets a mean lifetime of 37,300 miles with a standard deviation of 1000 miles. At α= 0.05, does the test suggest that mean life is less than 38000 miles?  because if is not this one is not appropiate

Data given and notation  

[tex]\bar X=37300[/tex] represent the sample mean    

[tex]s=100[/tex] represent the sample standard deviation for the sample  

[tex]n=18[/tex] sample size  

[tex]\mu_o =7500[/tex] represent the value that we want to test  

[tex]\alpha=0.05[/tex] represent the significance level for the hypothesis test.  

z would represent the statistic (variable of interest)  

[tex]p_v[/tex] represent the p value for the test (variable of interest)  

State the null and alternative hypotheses.  

We need to conduct a hypothesis in order to check if the mean is lower than 38000, the system of hypothesis would be:  

Null hypothesis:[tex]\mu \geq 38000[/tex]  

Alternative hypothesis:[tex]\mu < 38000[/tex]  

Since we don't know the population deviation, is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:  

[tex]t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}[/tex] (1)  

t-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".  

Calculate the statistic  

We can replace in formula (1) the info given like this:  

[tex]t=\frac{37300-38000}{\frac{1000}{\sqrt{18}}}=-2.970[/tex]  

P-value  

The degrees of freedom are given by:

[tex] df = n-1= 18-1=17[/tex]

Since is a left tailed test the p value would be:  

[tex]p_v =P(t_{17}<-2.97)=0.0043[/tex]  

Conclusion  

If we compare the p value and the significance level given [tex]\alpha=0.05[/tex] we see that [tex]p_v<\alpha[/tex] so we can conclude that we have enough evidence to reject the null hypothesis, so we can conclude that the true mean is lower than 38000 at 5% of signficance.  

Final answer:

The shipping firm's hypothesis test determines that the mean lifespan of a particular brand of tires is indeed less than 38,000 miles based on their sample data and the significance level.

Explanation:

The shipping firm is performing a hypothesis test about a population mean, where the suspected value is 38,000 miles. The null hypothesis (H0) would be that the mean life of the tires is equal to 38,000 miles, while the alternative hypothesis (H1) is that the mean life is less than 38,000 miles.

Using the provided sample data, we can calculate the test statistic (z-score), which helps us determine the p-value. The test statistic is given by (Sample Mean - Pop Mean) / (Standard Deviation / sqrt(n)) = (37300 - 38000) / (1000 / sqrt(18)). This gives us a test statistic of -3.1623.

We also know that our α is 0.05 for this problem. Now we find the p-value that is associated with this test statistic. If the p-value is less than our alpha, we reject the null hypothesis. Given our test statistic, we will indeed find a very low p-value, less than 0.05, which means we reject the null hypothesis and conclude the mean lifespan of the tires is less than 38,000 miles.

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can some one pls Use elimination to solve each system of equations

2x - y = -1
3x - 2y = 1

Answers

Answer:

Correct answer:  x = - 3  and y = - 5

Step-by-step explanation:

Given:

2 x - y = - 1

3 x - 2 y = 1

We will multiply first equation with number (- 2) and get:

- 4 x + 2 y = 2

then we add this equation to another and get:

- 4 x + 3 x = 2 + 1

- x = 3 / · (- 1)

x = - 3

now we replace x = - 3  in the first equation and get:

2 (- 3) - y = - 1  ⇒ - 6 - y = - 1 / ·(- 1)  ⇒ 6 + y = 1  y = 1 - 6 = - 5

y =- 5

God is with you!!!

Answer:

x= -3

y= -5

Step-by-step explanation:

-2 (2x-y= -1) = -4x + 2y = 2

-4x + 2y = 2

3x - 2y = 1

-------------------

-x = 3

x = -3

plug the x= -3 into the equation to find y

What is the approximate value of irrational number e (round to 5 decimal places)?

Answers

Answer:

2.71828

Step-by-step explanation:

In this question, we are asked to give the approximate value of the irrational number e.

We should understand that just like Pi, which is the ratio of the circumference of a circle to the diameter, we have the number called e. It is also a consistent like Pi and has an approximate value of 2.71828.

What does it mean when it is called irrational? it is an irrational number because it doesn’t have an exact fraction which is the ratio of two numbers and thus it has a non-ending list of numbers after the decimal point.

Final answer:

The irrational number e, also known as Euler's number, is approximately 2.71828 when rounded to five decimal places. It is crucial in mathematics, particularly calculus.

Explanation:

The question asks for the approximate value of the irrational number e rounded to five decimal places. The number e is a fundamental constant in mathematics, often referred to as Euler's number, which is approximately equal to 2.71828 when rounded to five decimal places.

This number plays a crucial role in various branches of mathematics, especially in calculus, relating to the rate of growth or decay in natural phenomena.

What’s the slope of (8,10) (-7,14)

Answers

m= -4/15
Your welcome:)
Final answer:

Using the formula for slope, we calculated that the slope of the line passing through the points (8,10) and (-7,14) is -4/15.

Explanation:

The slope of a line between two points ((x1,y1) and (x2,y2)) can be calculated using the formula for slope: m = (y2 - y1) / (x2 - x1).

In this case, your two points are (8,10) and (-7,14).

Therefore, we can calculate the slope using these points:

m = (14 - 10) / (-7 - 8) = 4/-15 = -4/15.

So, the slope of the line passing through the given points is -4/15.

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