Anyone care to do this, it would mean a lot

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

Find the area of the triangle shown 3 by 6

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.