Which set of ordered pairs is not a function? A)(2, 3),(4,9), (3, 8), (4, 15)
B) (-9, 4), (-6, 3), (-2, 8), (0, 21)
C) (1, 2), (3,5), (6,9), (7, 11)​

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?

Are the corresponding angles congruent? explain why or why not.

Darragh has a golden eagle coin in his collection with a mass of 13.551\,\text{g}13.551g. an uncirculated golden eagle coin has a mass of 13.714\,\text{g}13.714g.