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2 years ago

73 is what percent of 800

Mathematics

2 answers:

Xelga [282]2 years ago

4 0

Answer:

It should be %9.75

adoni [48]2 years ago

3 0

Answer:

0.09125%

Step-by-step explanation:

Divide 73 by 800 and you will get 0.09125

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Colin is an insurance adjuster who wants to determine how a driver's automotive insurance monthly premiums are related to the nu

GaryK [48]

Answer:

A multiple regression equation for this model can be expressed as:

$y=b_0+b_1x_1+b_2x_2+b_3x_3$

Step-by-step explanation:

To model this problem as a multiple regression equation, we need to define which are the independent and dependent variables.

The dependent variable is the one which we want to predict for any set of independent variables values. This is the case of the driver's automotive insurance monthly premiums.

The driver's automotive insurance monthly premiums is the dependent variable "y".

The independent variables are the ones that explain the dependent variable variation. In this case there are: number of miles driven per week (x1); the age of the car, in years (x2); and the number of accidents in which the driver has been involved in the past 5 years (x3).

Then, a multiple regression equation for this model can be expressed as:

$y=b_0+b_1x_1+b_2x_2+b_3x_3$

3 0

2 years ago

Factorize the following: <br>49x² - 25

creativ13 [48]

Answer:

(7x+5)(7x-5)

Step-by-step explanation:

We can use the difference of squares equation which states that when a number is multiplied like: (ax+b)(ax-b) then it equals (ax-b). In this equation, since there is no "b" in the typical ax^2+bx+c, we can recognize that the answer is not a square, but a difference of squares.

3 0

2 years ago

What is 5 2/3 + (-3 7/15)

Strike441 [17]

Answer:

i believe its 2.2

Step-by-step explanation:

7 0

2 years ago

Read 2 more answers

In a recent study of 35 ninth-grade students, the mean number of hours per week that they played video games was 16.6. The stand

Mariulka [41]

Answer:

a) 16.6

b) The 95% confidence level of the mean of the time playing video games is between 15.7 and 17.5 hours.

c) The 99% confidence level of the mean of the time playing video games is between 15.4 and 17.8 hours.

d) The margin of error increases as the confidence level increases, due to the value of z, which means that the 99% confidence interval is larger.

Step-by-step explanation:

a. Find the best point of estimate of the population mean

The best estimate for the population mean is the sample mean, which is 16.6

b. Find the 95% confidence level of the mean of the time playing video games

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1 - 0.95}{2} = 0.025$

Now, we have to find z in the Ztable as such z has a pvalue of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.025 = 0.975$ , so Z = 1.96.

Now, find the margin of error M as such

$M = z\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

$M = 1.96\frac{2.8}{\sqrt{35}} = 0.9$

The lower end of the interval is the sample mean subtracted by M. So it is 16.6 - 0.9 = 15.7 hours

The upper end of the interval is the sample mean added to M. So it is 16.6 - 0.9 = 17.5 hours

The 95% confidence level of the mean of the time playing video games is between 15.7 and 17.5 hours.

c. Find the 99% confidence interval of the mean time playing video games

Following the same logic as above, we have that $Z = 2.575$ . So

$M = 2.575\frac{2.8}{\sqrt{35}} = 0.9$

The lower end of the interval is the sample mean subtracted by M. So it is 16.6 - 1.2 = 15.4 hours.

The upper end of the interval is the sample mean added to M. So it is 16.6 + 1.2 = 17.8 hours.

The 99% confidence level of the mean of the time playing video games is between 15.4 and 17.8 hours.

d. Which is larger? Explain why.

The margin of error increases as the confidence level increases, due to the value of z, which means that the 99% confidence interval is larger.

5 0

2 years ago

Describe two ways to tell if a graph is a function

Dima020 [189]

Answer:

Inspect the graph to see if any vertical line drawn would intersect the curve more than once. If there is any such line, the graph does not represent a function. If no vertical line can intersect the curve more than once, the graph does represent a function.

Step-by-step explanation:

Hope that helps you out!

I wouldnt mind if you marked brainliest hehehe

Have a good day!

8 0

1 year ago