If f(x) 2x2 8x 9, which statement regarding the vertex form of f(x) is true? a. in vertex form, f(x) 2(x 2)2 1 and therefore has a minimum value of 1 b. in vertex form, f(x) 2 (x 2)2 1 and therefore has a minimum value of 2. c. in vertex form, f(x) 2(x 2)2 4.5 and therefore has a minimum value of 4.5 d. in vertex form, f(x) 2(x 2)2 4.5 and therefore has a minimum value of 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?