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 = -1 and z = -1, what is the value of 7a(a - z)?
| -84 | |
| 32 | |
| 0 | |
| 270 |