If (f-g)(x)=-3x^2-3 and g(x)= 2x^2-6x+8, then find f(x)

Which one ? is the answer and how to find this answer

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.

What’s 8y+48 and factor each expression completely