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 = 4, what is the value of -9b(b - z)?
| 810 | |
| 90 | |
| 30 | |
| 27 |