what is 4+5????????????????

Answer:

990

Step-by-step explanation:

Out of 1,370 students, 990 are predicted to have a television in their bedroom

From the complete question, the probability that a student has a television in his bedroom is:

p = 72.23%

Given that the number of students is 1370

The expected number of students that have television is:

E(x) = p * n

This becomes

E(x) = 72.23% * 1370

Evaluate the product

E(x) = 989.5510

Approximate

E(x) = 990

Hence, out of 1,370 students, 990 are expected to have a television in their bedroom

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Answer:

8%

Step-by-step explanation:

Let's say the tax percent was x%. Then, we can write the equation:

4.75 + x% * 4.75 = 5.13

Notice that both terms on the left have 4.75 so factor that out:

4.75 * (1 + x%) = 5.13

Divide both sides by 4.75:

1 + x% = 5.13/4.75 = 1.08

Subtract 1 from both sides:

x% = 0.08

Remember that % simply means "out of 100", so x% = x/100:

x/100 = 0.08

Multiply both sides by 100:

x = 8

Thus, the tax rate is 8%.

Hope this helps!

Answer:

3

Step-by-step explanation:

4x3 is 12

12-9 is 3

y = 3

Plug 3 in for x

y = 4(3) - 9

y = 12-9

y = 3

Answer:

  x = -b/(2a)

Step-by-step explanation:

Using the power rule for derivatives, you can find ...

  f'(x) = 2ax +b

Solving for x when f'(x) = 0, we have ...

  2ax +b = 0

  2ax = -b

  x = -b/(2a)

The critical value is x = -b/(2a).

Answer:

2.5

Step-by-step explanation:

25 is the area so u have to divide it by 10. When u divide 25 by 10, you get 2.5. 2.5 inches represents the height

Answer:

the answer is A 2.5

Step-by-step explanation:

Answer:

x=4             x = -3/2

Step-by-step explanation:

4x^2 – 7x = 3x + 24

Subtract 3x from each side

4x^2 – 7x-3x = 3x-3x + 24

4x^2 – 10x =   24

Subtract 24 from each side

4x^2 – 10 -24 = 24- 24

4x^2 -10x-24=0

Divide each side by 2

4/2x^2 -10/2x-24/2=0

2x^2-5x-12=0

Factor

(x - 4) (2 x + 3) = 0

Using the zero product property

x-4 =0   2x+3 =0

x=4         2x = -3

x=4             x = -3/2

Answer:

answer is c and f for short answer

Step-by-step explanation:

i did the rating by accident

Answer: [tex]n=4[/tex]

Simplify both sides of the equation

[tex]\frac{1}{2}n+-10=-8\\\frac{1}{2}n-10=-8[/tex]

Add 10 to both sides

[tex]\frac{1}{2}n-10+10=-8+10\\\frac{1}{2}n=2[/tex]

Multiply both sides by 2

[tex]2*(\frac{1}{2}n)=2*2\\n=4[/tex]

Answer:

[tex]n = 4[/tex]

Step-by-step explanation:

[tex] \frac{n}{2} - 10 = - 8 \\ \frac{n}{2} = - 8 + 10 \\ 2 \times \frac{n}{2} = 2 \times 2 \\ n = 4[/tex]

hope this helps you....

Answer:

27/72

Step-by-step explanation:

27/72 is correct because it is not equal to the ration 3:8

A ratio shows us the number of times a number contains another number. The ratio that is not equivalent to gray square to total square is C, that is 21/60.

A ratio shows us the number of times a number contains another number.

As we can see that the total number of squares is 8, while the number of gray scales is 3. Therefore, the ratio of the gray scales to total square can be written as,

[tex]\rm \dfrac{Gray\ Square}{Total\ Square}= \dfrac{3}{8}[/tex]

Now, if the option is reduced then,

A.)

[tex]\dfrac{9}{24} = \dfrac{3 \times 3}{3 \times 8}=\dfrac38[/tex]

B.)

[tex]\dfrac{15}{40} = \dfrac{5 \times 3}{5 \times 8}=\dfrac38[/tex]

C.)

[tex]\dfrac{21}{60} = \dfrac{7 \times 3}{5 \times 3 \times 4}=\dfrac{7}{20}[/tex]

D.)

[tex]\dfrac{27}{72} = \dfrac{3 \times 3 \times 3}{3 \times 3 \times 8}=\dfrac38[/tex]

Thus, the ratio that is not equivalent to gray square to total square is C, that is 21/60.

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Answer:

hello we need to see the charts

Step-by-step explanation:

Answer:

The correct answer is 12.

Step-by-step explanation:

There are four reindeer, Prancer, Quentin, Rudy, and Jebediah.

They are supposed to be put in a single file line to pull the sleigh.

However, Rudy and Prancer are best friends and need to be together, or they won't fly.

Thus the number of ways the reindeer are arranged are 3! × 2! = 6 × 2 = 12.

Therefore the reindeer can be arranged in 12 different ways to pull the sleigh.

Answer:

6

Step-by-step explanation:

By the diagram you can see that the upper quartile is 6. Also this answer was calculated and checked!

If  a number line goes from 0 to 10, the whiskers range from 2 to 8, and the box ranges from 3 to 6. a line divides the box at 5 then the upper quartile of the data is 5.

Statistics is the discipline that concerns the collection, organization, analysis, interpretation, and presentation of data.

We can see that the box ranges from 3 to 6, and the line inside the box divides it at 5.

Therefore, the upper half of the box represents the data between 5 and 6.

The whisker extends from the upper boundary of the box (6) to a value of 8.

Since the whisker represents the range of data within 1.5 times the interquartile range (IQR), we can calculate the IQR as follows:

IQR = Q₃ - Q₁

where Q₁ is the lower quartile and Q₃ is the upper quartile.

We know that the lower boundary of the box (Q₁) is 3.

IQR = Q₃ - 3

Also, we know that the whisker extends to a value of 8, which is 1.5 times the IQR. Therefore,

8 =  Q₃ + 1.5(IQR)

8 =  Q₃ + 1.5(Q3 - 3)

8 = 2.5 Q₃- 4.5

12.5 = 2.5 Q₃

Q₃ = 5

Therefore, the upper quartile of the data is 5.

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The complete question

The box plot represents the number of minutes customers spend on hold when calling a company. a number line goes from 0 to 10. The whiskers range from 2 to 8, and the box ranges from 3 to 6. a line divides the box at 5. What is the upper quartile of the data?

Answer:

Longer: 17 ft and Shorter: 8 ft

Step-by-step explanation:

Here is what we know:

a = longer part

b = shorter part

a + b = 25

2b + 1 = a

Let's rearrange the equation

b = 25 - a

Now we can plug this into the other equation.

2(25 - a) + 1 = a

50 - 2a + 1 = a

51 - 2a = a

51 = 3a

a = 17 ft

To find b, plug a into one of the equations.

17 + b = 25

b = 8 ft

I hope this helped! :)

Answer:

The weigth of the three heavy balls is 35.1 pounds.

Step-by-step explanation:

In order to solve this problem we will call the weigth of the light ball by "l" and the weigth of the heavy ball by "h". The total weigth of the six balls is 52.65 pounds, so we have:

3*l + 3*h = 52.65

We know that the weigth of the heavy ball is twice the weight of the light ball, so we have:

h = 2*l

We can use this value on the equation to solve for "l". We have:

3*l + 3*(2*l) = 52.65

3*l + 6*l = 52.65

9*l = 52.65

l = 52.65/9 = 5.85 pounds

h = 2*l = 2*5.85 = 11.7 pounds

3*h = 35.1 pounds

The weigth of the three heavy balls is 35.1 pounds.

Final answer:

The weight of a light bowling ball is approximately 5.85 pounds. The weight of a heavy bowling ball is approximately 11.7 pounds.

Explanation:

The total weight of the 6 bowling balls is 52.65 pounds. Let's represent the weight of a light bowling ball as x pounds. Since the weight of a heavy bowling ball is twice that of a light bowling ball, the weight of a heavy bowling ball is 2x pounds. So we can set up the equation:

3x + 3(2x) = 52.65

Simplify and solve for x:

3x + 6x = 52.65

9x = 52.65

x = 52.65/9

x = 5.85

The weight of a light bowling ball is approximately 5.85 pounds. The weight of a heavy bowling ball is twice that, which is approximately 11.7 pounds.

Answer:

The right expression is Option A - 3/4 divided by 5

Step-by-step explanation:

The whole cheese is 1.

Since she ate 1/4 of it, thus, she has,

1 - 1/4 = 3/4 left.

Now she split this remaining cheese into 5 places. Thus, it is expressed as;

(3/4) ÷ 5

This corresponds with option A

Answer:

n = 192

Step-by-step explanation:

The volume of a cube is given by the formula;

V = L³

where L = cube side

Given L as 1/4, the equation become;

V = (1/4)³

V = 1³/4³

V = 1/64

But volume of n cube = volume of rectangular prism

Therefore,

n * 1/64 = 3

n = 64 * 3

n = 192

Therefore, 192 units is needed.

Final answer:

To find the number of hours it takes for Robin to travel 320 miles using the equation y = 30x + 20, solve for x, yielding 10 hours.

Explanation:

The question asks about how many hours it will take for Robin to travel 320 miles, given the linear equation representing the distance traveled over time: y = 30x + 20. Here, 'y' represents the distance traveled in miles and 'x' represents the time in hours.

To find the number of hours required to travel 320 miles, we need to solve the equation for x when y is 320.

Let's set up the equation with y as 320:

320 = 30x + 20

To solve for x, subtract 20 from both sides:

300 = 30x

Now, dividing both sides by 30, we get:

x = 300 / 30

x = 10

So it will take Robin 10 hours to travel 320 miles.

Answer:

[tex]x = \frac{1}{2}[/tex]

Step-by-step explanation:

The ratio of gallons used for one shower is obtained by dividing the total of gallons by the number of showers per day:

[tex]n = \frac{17\,galllons}{2\,\frac{showers}{day} }[/tex]

[tex]n = 8.5\,\frac{gallons}{shower}[/tex]

The ratio of gallons used for one shower to total gallons used is:

[tex]x =\frac{8.5\,gallons}{17\,gallons}[/tex]

[tex]x = \frac{1}{2}[/tex]

Answer:

1:2

Step-by-step explanation:

For the each shower 17gallons is used

Daily shower is twice = 17*2

= 34 gallons

The ratio of the shower to the daily shower will be:

Each shower / daily shower

17/34 = 1/2

1:2

The amount n = $ 400.72 as fraction is A = 10,018/25

An element of a whole is a fraction. The number is represented mathematically as a quotient, where the numerator and denominator are split. Both are integers in a simple fraction. A fraction appears in the numerator or denominator of a complex fraction. The numerator of a proper fraction is less than the denominator.

Given data ,

Let the amount be represented as n

Let the fraction be represented as A

Now , To write "four hundred dollars and seventy two cents" as a fraction, we can first write it as the sum of its parts:

$ 400.72 = $ 400 + $ 0.72

Next, we can convert the cents portion to a fraction by dividing by 100:

$ 0.72 = 72/100

Now we can combine the two parts by adding them as fractions:

$ 400.72 = $400 + $0.72 = $400 + 72/100

To convert this to a fraction, we need to find a common denominator, which is 100:

$ 400.72 = ($ 400 x 100 + 72) / 100

= 40,072 / 100

Simplifying the fraction by dividing both the numerator and denominator by their greatest common factor of 4 gives:

$ 400.72 = 10,018/25

Hence , "four hundred dollars and seventy two cents" is equivalent to the fraction 10,018/25 in reduced form

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The given amount in fraction is [tex]\frac{40072}{100}[/tex] and its reduced fraction is [tex]\frac{10018}{25}[/tex].

1. Understanding the Total Amount in Cents:

Four hundred dollars and seventy-two cents' is equivalent to 400 dollars + 72 cents. First converting everything to cents. Since 1 dollar is equal to 100 cents:

[tex]four\ hunder\ dollars\ and\ seventy\ two\ cents = 400 \times 100\ \text{cents} + 72\ \text{cents}= 40072\ cents[/tex]

2. Since 1 dollar = 100 cents, dividing total amount in cents by 100:

[tex]Total\ amount= \frac{40072}{100}[/tex]

Reducing the fraction by dividing numerator and denominator by 4:
[tex]Reduced\ Fraction = \frac{10018}{25}[/tex]

Answer: 1,453

Step-by-step explanation:

Ed 2020

Answer:

1453 cm squared

Step-by-step explanation:

Answer:

6

Step-by-step explanation:

22 - 4 = 18

18 / 3 = 6

Answer:

6

Step-by-step explanation:

22-4=18/3=6

start from what you get that use the inverse to get the the original answer

Answer:

The correct option is (C) convenience sample.

Step-by-step explanation:

Convenience sampling is a kind of non-probability sampling, i.e. all items does not have an equivalent chance or probability of being selected. This type of sampling method does not comprises of random collection of items.

Convenience sampling is where we take in items which are easy to reach or collect.

For example, sampling the the students of your own class or collecting sample from your own neighborhood.

In this case the Chief Financial Officer of Harrison Haulers, Inc. asks her staff to inspect the last 200 vouchers of the 2500 payroll vouchers that have been issued since January 1, 2000.

She did so because her staff did not have that much time in hand and it is quite convenient to check the last 200 vouchers.

This is because it is quite easy to review the last 200 payroll vouchers since they would be the most recent ones and quite easily accessible.

So, the sampling method used by the Chief Financial Officer of Harrison Haulers, Inc. is Convenience sampling.

Thus, the correct option is (C).

Final answer:

Pinky Bauer's inspection of the last 200 payroll vouchers is an example of convenience sampling. The correct answer is option (c).

Explanation:

Pinky Bauer, Chief Financial Officer of Harrison Haulers, Inc., suspects irregularities in the payroll system. Since her staff will inspect the last 200 vouchers, the sample they will use is a convenience sample.

Convenience sampling is a nonrandom method that involves selecting samples that are easiest to access. It is often used due to time constraints or other limitations, but it is important to note that this method may not provide a representative cross-section of the population, which can lead to biased results and conclusions.

Answer:

See below.

Step-by-step explanation:

The way to check if a graph is a function is by the vertical line test.

If, anywhere on the graph, a vertical line passes through the graph at more than one point then it is NOT a function.

So we see that the graph on the top left is not a function because we can draw a vertical line through the diamond shaped graph which pass through the graph at 2 points.

The same applies to graph 2:- its not a function for the same reason.

However Graph 6 is a function because any vertical line drawn will only pass through the graph at one point.

Graph 3 is a function  for the same reason.

Graph  4 is not a function because a vertical line passes through the 2 dots on the right.

What about Graph 5?

Answer:

a) 5180

Step-by-step explanation:

We must calculate with respect to each of the options:

a)  5180

We have that the mean (m) is equal to 5850, the standard deviation (sd) 1125 and the sample size (n) = 20

They ask us for P (x <5180)

For this, the first thing is to calculate z, which is given by the following equation:

z = (x - m) / (sd / (n ^ 1/2))

We have all these values, replacing we have:

z = (5180 - 5850) / (1125 / (20 ^ 1/2))

z = -2.66

With the normal distribution table (attached), we have that at that value, the probability is:

P (z <-2.66) = 0.0039

Which means that the probability is 0.39%, which is a very low probability, which is not necessary to calculate the other options, we already know that this data is very unusual.

The mean expense of (a) 5180 is considered unusual because its z-score is approximately -2.67, which is beyond the usual ±2 range for a normal distribution.

To determine which of the given mean expenses would be considered unusual, we will use the concept of the Standard Error of the Mean (SEM) and the properties of a normal distribution.

The SEM can be calculated as:

[tex]SEM = \frac{\sigma}{\sqrt{n}}[/tex]

Where:

So,
[tex]SEM = \frac{1125}{\sqrt{20}} = 251.21[/tex]

We then determine the z-scores for the given mean expenses to see how many standard errors away from the population mean they are. The population mean is $5850.

A z-score beyond ±2 is generally considered unusual. Therefore, the mean expense of 5180 would be considered unusual as its z-score is approximately -2.67.

Answer:

The equation that can be used to determine the maximum height is given as h = 15tan4.76°

Step-by-step explanation:

The question given is lacking an information. Here is the correct question.

"By law, a wheelchair service ramp may be inclined no more than 4.76 degrees. If the base of the ramp begins 15 feet from the base of a public building, which equation could be used to determine the maximum height, h, of the ramp where it reaches the building's entrance"

The whole set up will give us a right angled triangle with the base of the building serving as the adjacent side of the triangle and the height h serving as the opposite side since it is facing the angle 4.76°

The side of the wheelchair service ramp is the hypotenuse.

Given theta = 4.76°

And the base of the building = adjacent = 15feet

We can get the height of the building using the trigonometry identity SOH CAH TOA.

Using TOA

Tan(theta) = opposite/Adjacent

Tan 4.76° = h/15

h = 15tan4.76°

The equation that can be used to determine the maximum height is given as h = 15tan4.76°

Answer:

median-7

minimum-1

lower quartile-2

maximum-12

upper quartile-11

Step-by-step explanation:hope this helps

Answer:

The upper quartile is 11.

the lower quartile is 2.

the maximum is 12.

the minimum is 1.

the median is 7.

Step-by-step explanation:

Answer:

Step-by-step explanation:

Total number of kindergarten children in that region that were tested is 160

It is generally believed that nearsightedness affects about 12% of children in a certain region. Therefore,

The expected number of kindergarten children expected to be​ nearsighted is

12/100 × 160 = 19

Probability of success, p = 0.12

Probability of failure, q = 1 - p = 1 - 0.12 = 0.88

Standard deviation = √npq = √(160 × 0.12 × 0.88) = 4.11

Answer: continuous objective.

Step-by-step explanation:

Continuous objective-based control for self-optimizing systems with changing operation modes. Self-optimization enables technical systems to adapt their behavior to varying environmental conditions and changing operation modes. Objective functions serve as evaluation criteria for the system behavior.

Answer:

Step-by-step explanation:

√20 can be rewritten as the product of two radicals:  √4√5,

and √4 = 2.

Thus, 5√20 = 5(2)√5 = 10√5.  Thus, B:  10 is correct; k = 10.

The area of a circle is calculated using the formula A = πr^2. When the diameter is 4, the area is 4π square units.

The area of a circle, A, can be calculated using the formula A = πr2, where r is the radius of the circle. The diameter, d, is twice the radius, so we can write the formula as A = π(d/2)2. When the diameter is 4, we can substitute d = 4 into the formula and calculate the area.

A = π(4/2)2 = π(2)2 = π(4) = 4π

So, the area of a circle with a diameter of 4 is 4π square units.

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