Dan and chuck go out to lunch. when they finished eating they paid the bill plus 7.5% tax. the total cost for their meals plus tax was $55.90. what was the cost of their meals before tax?

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?