3.1.3 Solving Systems of Linear Inequalities - Practice (continued)
5. In an auditorium, a charity show is conducted in order to raise at least $3,000. The auditorium can accommodate up to180 spectators. Tickets cost $12 for students and $20 for adults. Write and graph the system of inequalities that determine whether the charity will reach its goal.
6. Graph the given system of inequalities and classify the figure created by the solution region. x − y ≤ 1 x + y ≤ 3 x ≥ − 1
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