Idon't understand this question can you me? the question a class fundraiser is earning $7 per car wash and $4 per cake sold. supplies for the car wash and baking cost them $50. due to time constraints, they will wash less than 50 cars and can bake no more than 30 cakes. they want to raise at least $320 to give to a local charity.
we are supposed to graph it but i don't under stand what inequality equation we are supposed to use.