You can spend at most $60 on beads. A bag containing red beads costs $2 per bag.
A bag containing blue beads costs $3 per bag. You need more bags of blue beads
than bags of red beads.
a. Write and graph a system of linear inequalities that represents the situation.
b. Identify and interpret a solution of the system.
c. Use the graph to determine whether you can buy 9 bags of red beads and
12 bags of blue beads.