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 = -3 and z = -9, what is the value of 7a(a - z)?
| -126 | |
| -70 | |
| -315 | |
| -270 |