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 = -6 and y = -6, what is the value of 9a(a - y)?
| -24 | |
| -126 | |
| 0 | |
| 720 |