How to solve this and answer : 2x-(3-x) > x+1

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 x-1 and x+3 are the factors of x3+10x2+ax+b find a and b

Assume that y varies inversely with x. if y=1.6 when x=0.5 find x when y=3.2 acellus answer