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 = 4 and x = -1, what is the value of -9c(c - x)?
| -6 | |
| 378 | |
| -180 | |
| 945 |