Imostly need writing a linear inequality, i think i might be able to graph it though.

you have two part-time jobs. one is ar a grocery store, which pays $9 per hour, and the other is mowing lawns which pays $6 per hour. between the two jobs, you want to earn at least $150 per week. write a linear inequality that shows the different numbers of hours you can work at each job, and sketch the graph of the inequality. from the graph, find several ordered pairs with positive integer coordinates that are solutions of the inequality.

Quick! a survey of 57 customers was taken at a bookstore regarding the types of books purchased. the survey found that 33 customers purchased mysteries, 25 purchased science fiction, 18 purchased romance novels, 12 purchased mysteries and science fiction, 9 purchased mysteries and romance novels, 6 purchased science fiction and romance novels, and 2 purchased all three types of books. a) how many of the customers surveyed purchased only mysteries? b) how many purchased mysteries and science fiction, but not romance novels? c) how many purchased mysteries or science fiction? d) how many purchased mysteries or science fiction, but not romance novels? e) how many purchased exactly two types of books?