Find the rule for (3,1) (6,2) (9,3) (12,4) (15,5)

The pyramid below was dissected by a horizontal plane which shape describes the pyramid horizontal cross section

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.

Factor and solve to find roots x squared -x - 90 =0