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 = -9, what is the value of -9b(b - y)?
| -36 | |
| -32 | |
| 324 | |
| 72 |