Ineed for this one do i add them up and equal them to 180?

So m<1 would equal 30 degrees. If you are going to add them to 180 degrees. You are going to take 100 and 50 and add them up. your equation would be 100+50=150. next your going to subtract 150 and 180. your equation would be 180-150=30. I hope this helps.