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 c = 9 and z = -2, what is the value of 7c(c - z)?
| -64 | |
| 693 | |
| 144 | |
| -30 |