Identify the factors of 15ab + 35a - 6b - 14.

(5a - 2)(3b + 7)
(5a + 2)(3b - 7)
(5a - 7)(3b + 2)
(5a + 7)(3b - 2)

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?