Catelyn has 2 summer jobs. each week, she works at least 15 hours at a pet store and at least 6 hours as a nanny. she earns $10/hour at the pet store and $8/hour as a nanny. catelyn wants to work no more than 30 hours and earn at least $250/week. let x represent the number of hours catelyn works at the pet shop in one week and y represent the number of hours she works as nanny in one week. write an inequalities that model the four constraints in this situation.