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 = 1 and y = -8, what is the value of 9a(a - y)?
| 54 | |
| 50 | |
| -224 | |
| 81 |