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 x = 3, what is the value of 5a(a - x)?
| 72 | |
| -280 | |
| -10 | |
| -20 |