At a 200 meter swimming competition bill got a personal record of 45 seconds and Tim was 5 seconds faster then bill at the competition what was the speed for Tim at the competition ?

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?