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 = 3 and z = 6, what is the value of -9c(c - z)?
| 81 | |
| 504 | |
| 180 | |
| 21 |