Mathew invested $3000 into two accounts. One account paid 3% interest and the other paid 8% interest. He earned 4% interest on the total investment how much money did he put in each account??

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?

How can you find the mean absolute deviation (mad) for this set of data?

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