Can you help me out with question 1 a, b, c, d im stuck.

When you answer this can you explain

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.

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.