Explain how a number and it's reciprocal are related adding 28 ?

The difference of 2 numbers is 21 and the quotient of the equation is 4 then what are the two numbers?

17 in long 1.3 ft wide and 8in high what is the volume

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.