What is the factored form of x3-1

Use set builder notation to represent the following set: { -3, -2, -1, 0}

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?

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?