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 b = -9 and z = -7, what is the value of 2b(b - z)?
| -810 | |
| -20 | |
| 36 | |
| 25 |