Need help ive been stuck on this lesson to long

Which statements regarding the diagram are true? check all that apply.

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

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.