Evaluate 3x + 6y + 4 when x = 3 and y = -1.
Note
Substitute the given values carefully: 3(3) + 6(-1) + 4 = 9 - 6 + 4 = 7. A common mistake is to ignore the sign of y or the sign of the coefficient.
Evaluate 3x + 6y + 4 when x = 3 and y = -1.
Substitute the given values carefully: 3(3) + 6(-1) + 4 = 9 - 6 + 4 = 7. A common mistake is to ignore the sign of y or the sign of the coefficient.