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 = 5 and y = -5, what is the value of -9a(a - y)?
| -450 | |
| 35 | |
| 63 | |
| 98 |