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 = -1 and y = 5, what is the value of 9b(b - y)?
| 54 | |
| 40 | |
| -448 | |
| -112 |