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 = 4, what is the value of 7a(a - z)?
| -50 | |
| -21 | |
| -27 | |
| -144 |