Who want talking me I was bored

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?

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b

700 miles the train takes 5 hours to a travel the distance at what unit rate is the train traveling?