Please help with what goes in these blanks

If sr is 4.5cm and tr is 3cm, what is the measure in degrees of angle s?

Which value of m will create a system of parallel lines with no solution? y = mx - 6 8x - 4y = 12

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.