Zahra owns a food truck that sells tacos and burritos. She only has enough supplies to
make 120 tacos or burritos. She sells each taco for $4.25 and each burrito for $8.
Zahra must sell no less than $660 worth of tacos and burritos each day. Also, she can
sell a minimum of 80 burritos. If a represents the number of tacos sold and y
represents the number of burritos sold, write and solve a system of inequalities
graphically and determine one possible solution.