Factor completely 5x2 − 40

Restrictions on f(x) = 1/x+5 and g(x) = x-2

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?

If f(x) = 2x + 8 and g(x) = x4, what is (gº)?