If ( e, f) = (7,2) and (g,h) = (11,5), find the value of the following expression

Marlo uses 252 lb of gravel to cover a garden plot of 36 ft2. How many pounds of gravel does it take to cover one square foot? H

irakobra [83]

The area and the amount of gravel are illustrations of proportions.

7 lb will cover an area of 1 square foot, while 315 lb will cover an area of 45 square feet.

The given parameters are:

$252\ lb= 36ft^2$

The number of pound for an area of 1 square foot is calculated as follows:

$x = 1ft^2$

So, we have:

$x = 1ft^2$

$252\ lb= 36ft^2$

Cross multiply

$x \times 36 = 252 \times 1$

Divide both sides by 36

$x = 7lb$

The area to be covered with 315lb gravel is calculated as follows:

$315lb = y$

So, we have:

$315lb = y$

$252\ lb= 36ft^2$

Cross multiply

$y \times 252 = 36 \times 315$

$y \times 252 = 11340$

Divide both sides by 252

$y = 45$

Hence, 7 lb will cover an area of 1 square foot, while 315 lb will cover an area of 45 square feet.

Read more about proportions at:

brainly.com/question/13114933

6 0

3 years ago

The following data was collected from a local high school and represents the number of points the women's basketball team scored

andrew-mc [135]

Answer:

The degrees of freedom are:

$df=n-1=10-1=9$

The confidence level is 0.95 or 95%, the significance would be $\alpha=0.05$ and $\alpha/2 =0.025$ , the critical value for this case would be $t_{\alpha/2}=2.262$

And replacing we got:

$54.7-2.262\frac{9.956}{\sqrt{10}}=47.58$

$54.7+2.262\frac{9.956}{\sqrt{10}}=61.82$

Step-by-step explanation:

Information given

In order to calculate the mean and the sample deviation we can use the following formulas:

$\bar X= \sum_{i=1}^n \frac{x_i}{n}$ (2)

$s=\sqrt{\frac{\sum_{i=1}^n (x_i-\bar X)}{n-1}}$ (3)

$\bar X= 54.7$ represent the sample mean

$\mu$ population mean

s=9.956 represent the sample standard deviation

n=10 represent the sample size

Confidence interval

The confidence interval for the mean is given by the following formula:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

The degrees of freedom are:

$df=n-1=10-1=9$

The confidence level is 0.95 or 95%, the significance would be $\alpha=0.05$ and $\alpha/2 =0.025$ , the critical value for this case would be $t_{\alpha/2}=2.262$

And replacing we got:

$54.7-2.262\frac{9.956}{\sqrt{10}}=47.58$

$54.7+2.262\frac{9.956}{\sqrt{10}}=61.82$

3 0

3 years ago

PLZ HELP

SVEN [57.7K]

Answer:

This is the answer, dont forget to change the wording or you'll get a plagiarism strike.

Step-by-step explanation:

3 0

3 years ago

What is the value of 4x-7 when x=4? 1 9 16 23

harina [27]

Answer:9

Step-by-step explanation:

4x4=16

16-7=9

4 0

4 years ago

Read 2 more answers

What is 10000- 7500000

exis [7]

Answer:

-7,490,000

Step-by-step explanation:

7 0

4 years ago