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 = -9 and y = 9, what is the value of 5b(b - y)?
| -42 | |
| 108 | |
| 810 | |
| -768 |