Solve each equation

5x-2=8
4x-3=2x + 9
6x+3=2x+8

The depth of a lake at a certain point, wich is a function of the distance of that point from shore, is 30 feet.

The measure of an angle is 117°. what is the measure of a supplementary angle?

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?