Evaluate 4x + 4y + 5 when x = -3 and y = 5.
Note
Substitute the given values carefully: 4(-3) + 4(5) + 5 = -12 + 20 + 5 = 13. A common mistake is to ignore the sign of y or the sign of the coefficient.
Evaluate 4x + 4y + 5 when x = -3 and y = 5.
Substitute the given values carefully: 4(-3) + 4(5) + 5 = -12 + 20 + 5 = 13. A common mistake is to ignore the sign of y or the sign of the coefficient.