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 = -7 and y = 5, what is the value of -9c(c - y)?
| -972 | |
| -756 | |
| 72 | |
| -420 |