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 -3a(a - y)?
| 42 | |
| -40 | |
| 1134 | |
| -168 |