Question

Can someone explain if I am wrong?

Answer 1

Answer:

Step-by-step explanation:

A. (b - 10)(b + 10) = 180

$b^{2}$-100 = 180

$b^{2}$= 280

b = $\sqrt{280}$

b = 2$\sqrt{70}$

Your A is correct.

B. 2$\sqrt{70}$ - 10 = c

c = 6.733200531 = 6.73  Try rounding to 3 significant figures.

C. 2$\sqrt{70}$ + 10 = d

d = 26.73320053 = 26.7

You are correct in all 3 answers. Perhaps you should try rounding to 3 significant figures for your c and d values.

I hope this helps!! ^-^

Answer 2

Answer: A first one at the top
I hope this helps you with your stuff !