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 = -9, what is the value of 7a(a - y)?
| 0 | |
| 784 | |
| 81 | |
| -81 |