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 = 8 and z = -8, what is the value of 5a(a - z)?
| 640 | |
| 120 | |
| 24 | |
| -64 |