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 = 4 and z = -1, what is the value of 7b(b - z)?
| 256 | |
| 140 | |
| -300 | |
| 63 |