11. you can work at most 20 hours next week. you need to earn at least $92 to cover you weekly expenses. your dog- walking job pays $7.50 per hour and your job as a car wash attendant pays $6 per hour. write a system of linear inequalities to model the situation. 2. marsha is buying plants and soil for her garden. the soil cost $4 per bag, and the plants cost $10 each. she wants to buy at least 5 plants and can spend no more than $100. write a system of linear inequalities to model the situation.