The drama club is selling tickets to their play to raise money for the show's
expenses. Each student ticket sells for $4 and each adult ticket sells for $9.
The auditorium can hold no more than 110 people. The drama club must
make a minimum of $720 from ticket sales to cover the show's costs. If x
represents the number of student tickets sold and y represents the number of
adult tickets sold, write and solve a system of inequalities graphically and
determine one possible solution.