Write all subsets of set {1, 2, 3}​

Tom is the deli manager at a grocery store. he needs to schedule employee to staff the deli department for no more that 260 person-hours per week. tom has one part-time employee who works 20 person-hours per week. each full-time employee works 40 person-hours per week. write and inequality to determine n, the number of full-time employees tom may schedule, so that his employees work on more than 260 person-hours per week. graph the solution set to this inequality.

What function has a range {yly< 5}? question on picture above^

Simplify the given expression leaving the answer in improper fraction form. 2/3+5/6