Please help me I would appreciate it a lot

How many solutions does the nonlinear system of equations graphed below have? a. one b. zero c. four d. two

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.

Which expression is the factorization of x^2+10+21