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 = 5 and x = 1, what is the value of -9c(c - x)?
| -56 | |
| 20 | |
| 56 | |
| -180 |