Sampson gets 12 hits for 15 times at bat. What percent of the time does sampson gets a hit?

Can someone answer these problems for me

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?

What is the perimeter of an equilateral triangle if each side is (x+3)?