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 z = -1, what is the value of -9b(b - z)?
| -560 | |
| -210 | |
| -144 | |
| 0 |