Please help me get the answer it’s due very soon

For the equations below which statement is true ?

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?

Write an inequality for this description. - one fourth of the opposite of the difference of five and a number is less than twenty.