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 = 4 and x = 1, what is the value of -9a(a - x)?
| 150 | |
| -108 | |
| -40 | |
| 60 |