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 = -6 and z = 4, what is the value of -9c(c - z)?
| -81 | |
| -42 | |
| -126 | |
| -540 |