How would I solve questions similar to this? I'm looking for an explanation more than I am an answer :D

Find the solution set of this inequality. enter your answer in interval notation using grouping symbols. |8x-4| ≤ 12

If g^-1(x) is the inverse of g (x) which statement must be true

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.