When solving an equation with two variables, replace the variables with the values given and then solve the now variable-free equation. (Remember order of operations, PEMDAS, Parentheses, Exponents, Multiplication/Division, Addition/Subtraction.)
If b = 8 and z = 7, what is the value of -9b(b - z)?
| 30 | |
| -40 | |
| 1008 | |
| -72 |