Melissa is planning to invest a total of $12,000 in two accounts. if she invests $8,000 in a savings account paying 6% annual simple interest, at what rate does the remainder of her money need to be invested so that the two investments together yield at least $950 in yearly simple interest? (set up and solve an inequality to answer this question.)

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?