Mr. wilson wants to park his car in a parking garage that charges $3 per hour along with a flat fee of $6. if mr. wilson paid $54 to park in the garage, for how many hours did he park there? i need to pass this test plzzz

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?