Stephanie, amanda, and alison are selling girl scout cookies. stephanie sold three times as many boxes of cookies as alison. amanda sold two less than four times as many boxes of cookies as alison. the three girls sold a total of 190 boxes. how many boxes did each girl sell?

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?

Precalculus question, image attached.

The price of a dozen eggs was $1.63. suppose the price increases m dollars per dozen and then the price decreases $0.12 per dozen. which expression represents the current price of eggs after the two price changes?