What number must you add to complete the square? x^2 +12x=40

If angle 2=3x +1 and angle 3=2x +4what is angle 2

5. (03.02)if g(x) = x2 + 3, find g(4). (2 points)1619811

The party planning committee has to determine the number of tables needed for an upcoming event. if a square table can fit 8 people and a round table can fit 6 people, the equation 150 = 8x + 6y represents the number of each type of table needed for 150 people.