In the following math problem, which operation should you do first? 8 + 3(72 x 4) – 5 ÷ 2 a. 8 + 3 b. 72 c. 7 x 4 d. 5 ÷ 2

C - 72 x 4

If using PEMDAS, you can already deduce the exponents and parenthesis. With these gone, you're left with multiplication and division and this is decided by which comes first from left to right. Thus, leaving you with the first multiplication problem presented.

Hope this helps!

8(-10x+3.5y-7)

8×-10x + 8×3.5y + 8×-7

-80x + 28y - 56

therefore

-80x+28y-56 is the correct answer