A large concrete mixing machine can mix a certain amount of concede in 12 hours, while a smallet one can mix the same amount in 20 hours, Mixing simultaneously, how long would it cake both machines to the same
amount of concrete?

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.