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 = 9 and x = 9, what is the value of 5a(a - x)?
| -66 | |
| 0 | |
| -252 | |
| 210 |