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 = 7 and z = -5, what is the value of 9b(b - z)?
| 108 | |
| 0 | |
| 756 | |
| 882 |