What is the domain of f(x) = 3 square root of x + 2 -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?

Ithink i know it but i want to be sure so can you me out ?

What is the equation of a line that passes through points (0, 4) and (-4,-8)?