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 b = 4 and x = 7, what is the value of -9b(b - x)?
| -72 | |
| 108 | |
| -480 | |
| -240 |