I WILL GIVE BRAINLIST PLEASE HELP Is the set of rational expressions closed under ​subtraction​? Explain p(x) - r(x) =
q(x) s(x)
2. Is the set of rational expressions closed under ​multiplication​? Explain ( p(x) ) ( r(x) ) =
q(x) s(x)
3. Is the set of rational expressions closed under ​division​? Explain
p(x) ÷ r(x) = q(x) s(x)

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.