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 a = -9 and z = -2, what is the value of -5a(a - z)?
| -40 | |
| 637 | |
| -315 | |
| -72 |