Mplify the expression below. 6m^3 - 16m^2 + 15m - 40/2m^2 + 5 3m - 8 3m + 5 2m - 6 2m + 8

Sarah took the advertising department from her company on a round trip to meet with a potential client. including sarah a total of 11 people took the trip. she was able to purchase coach tickets for $280 and first class tickets for $1280. she used her total budget for airfare for the trip, which was $6080. how many first class tickets did she buy? how many coach tickets did she buy?