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 2a(a - z)?
| 54 | |
| -80 | |
| 252 | |
| 72 |