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 a = -7 and y = -4, what is the value of -a(a - y)?
| -40 | |
| -18 | |
| -21 | |
| 210 |