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 z = 5, what is the value of 5b(b - z)?
| -144 | |
| 160 | |
| 0 | |
| 630 |