Simplify 4a+3b-(-2a-3b)

Me find the missing dimension of a triangle height: 7 in., area: 21^2

What other information do you need to prove triangle dac=bca by asa

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?