A poll was taken of 100 students at a commuter campus to find out how they got to campus. The results were as follows:
34 said they drove alone.
25 rode in a carpool.
28 rode public transportation.
4 used both carpools and public transportation.
7 used both a carpool and sometimes their own cars.
4 used buses as well as their own cars.
3 used all three methods.
How many used none of the above-mentioned means of transportation?

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.