Thomas invested $8,500 for one year. Part of the money was invested at 6% and the rest at 9%. The total interest earned was $667.50. How
much did Thomas invest at the 6% rate?

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

Maren is buying carpet for her rectangular living room. the room is 4.8 yards wide and 5.2 yards long. how much carpet does she need to buy? enter your answer as a decimal in the box. yd2

Reading tests are compared for two students. sara got 98, 100, 65, 78, 98, 46, 100, 100, 45, and 50 on her reading test. lee got 97, 67, 89, 99, 100, 45, 79, 89, 58, and 67 on his reading test.