Find 4 inequalities, algebra homework help

Meera is a high school student who is going to work two jobs this summer. She will work as a painter for one job and will mow lawns for the second job. She will work a total of at most 24 hours a week at both jobs. For her first job, painting, she has found that she needs 1.5 hours of preparation time for every hour he works. For her second job, mowing lawns, she needs 0.5 hours of preparation time for every hour she works. She is not paid for preparation time so she does not count this time in her hours of work. She wants her total preparation time to be at most 18 hours per week. If Meera makes 12 dollars an hour painting and 9 dollars an hour mowing lawns, what is the best combination of hours of painting and mowing (she wants to make the most money) for her to schedule each week? 

Only find inequalities …….