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 = -1 and y = 6, what is the value of -7a(a - y)?
| -49 | |
| -18 | |
| 128 | |
| -81 |