Jonathan owns a food truck that sells tacos and burritos. he only had enough supplies to make 90 tacos or burritos. he sells each taco for $3 dollars and each burrito for $7. jonathon must sell at least $420 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 slice a system of inequalities graphically and determine one possible solution.