The sum of (c-4) + (3c+9)

Complete the equation of the line through (−10,3) and (−8,−8). use exact numbers.

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?

Is a square always, sometimes, or never a parallelogram