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 c = -9 and z = -8, what is the value of 9c(c - z)?
| 81 | |
| -180 | |
| 42 | |
| 80 |