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 = 3 and y = 7, what is the value of -2a(a - y)?
| -128 | |
| 24 | |
| -72 | |
| 675 |