I have to pass this in a few minutes please help me!!

What are the solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2

How do you determine if an ordered pair is a solution to a given equation?

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.