Solve each system by eliminati 1) 10x - 4y = 24 7x - 4y= 12

What is the range for 31,39,29,34,37,24,36,33,34,28

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 140% of 25? because i need