Kiara invested $3,500 into two accounts. One account paid 5% interest and the other paid 7.5% interest. She earned 6% interest on the total investment. How much money did she put in each account?

You’re ordering more thread for blue jeans co. you usually purchase from ted’s threads, which sells 12 thread spools for $27. you recently received a notice from wade's wares that says you can buy thread from them for $2.30 each for the first 2 dozen and $2 a spool thereafter. you need to order 5 dozen spools. what percentage can you save by going with wade’s wares?