8squared plus 9 left parenthesis 12 divided by 3 times 2 right parenthesis minus 7. explain each of your steps.

129

Step-by-step explanation:

PEMDAS (parenthesis, exponents, multiplication / division, addition /subtraction.) I will use these as abbreviations.

8^2 + 9 (12/3*2) - 7

P: Start with P, and inside P go left to right with M/D

    D: 8^2 + 9 (4*2) - 7

    M: 8^2 + 9 (8) - 7

E: The next step is E, so I will do 8^2

64 + 9 (8) - 7

M/D: I will then multiply from left to right

64 + 72 - 7

A/S: Finall I will add and subtract from left to right.

   A: 136 - 7

   S: 129

they would have to work 32 hours.