To find the area of all of the figures, all you need to do is base x height or the length x width.
Your answers for 1-6 are all correct.
For 7-9, remember that the area is the length times the width.
7) length x width, 42 x 30=1260
8) 17 x 22= 374
9) Since the length and width are the same in a square just multiply the side by itself. 2.7 x 2.7= 7.29
Hope this helps.

5 0

3 years ago

Please help!! <br><br><br> Find the inverse of y=7x-10. Is the inverse a function?

kolezko [41]

Answer: $f^{-1}$ (x) = $\frac{x+10}{7}$

Step-by-step explanation:

To find the inverse , all we need do is to make x the subject of the formula.

y = 7x - 10

Add 10 to both sides

y + 10 = 7x

divide both sides by 7

Therefore:

x = y + 10 / 7 , that is

$f^{-1}$ (x) = $\frac{x+10}{7}$

8 0

3 years ago

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Sue and Javier are working on a statistics project to estimate the proportion of students at their school who have a pet dog. Su

egoroff_w [7]

Answer:

the width of sue's interval will be narrower than javier's.

Step-by-step explanation:

in this problem, i do believe that sue's interval will be more narrow. in the formula,

p-hat ± $\sqrt{phat(1-phat)/ n$ ,

a larger "n" value will lead to a smaller standard error. given that the population proportion is the same for both, and the sample size is the only difference, the standard error of sue's interval will be smaller than javier's, therefore making her whole confidence interval smaller.

again, i do believe this is correct, this is what i have in my AP stat notes. hope this helps!

6 0

3 years ago

I WILL BE MARKING BRAINLIEST AND IS 100 POINTS

Minchanka [31]

13. Your answer is 18,000 - 7,500

14. 72 (B)

15. $3.15 (C)

16. 1 1/8 pounds (C)

4 0

3 years ago

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