pedro owns a food truck that sells tacos and burritos. He only has enough supplies to make 140 tacos or burritos. He sells each taco for $3 and each burrito for $6. Pedro must sell a minimum of $600 worth of tacos and burritos each day. If � x 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.