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 = 5, what is the value of -5a(a - z)?
| -180 | |
| 24 | |
| 105 | |
| -504 |