Find the area of the triangle SHOW WORK

Simplify a7/a4 a) 1/a3 b)-a/a2 c)a4/a3 d)a3

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?

Find the value of x. give reasons to justify your solutions! l, m ∈ kn