Evaluate 3x + 5y when x = 5 and y = -3.
Note
Substitute the given values carefully: 3(5) + 5(-3) + 0 = 15 - 15 + 0 = 0. A common mistake is to ignore the sign of y or the sign of the coefficient.
Evaluate 3x + 5y when x = 5 and y = -3.
Substitute the given values carefully: 3(5) + 5(-3) + 0 = 15 - 15 + 0 = 0. A common mistake is to ignore the sign of y or the sign of the coefficient.