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 b = 7 and y = 2, what is the value of 9b(b - y)?
| -315 | |
| 315 | |
| 42 | |
| 1224 |