Find the length of the segment, AB

Use set buikder notation to represent the following set: {, -2, -1, 0}

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 of the following shows the length of the third side, in inches, of the triangle below