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 = 2 and z = 4, what is the value of -7a(a - z)?
| -81 | |
| 28 | |
| 630 | |
| -12 |