Sam receives the following scores on his English tests: 63, 84, and 96. What average score does he need on the last two tests in order to maintain an 85 average?

Sam would have to get a 97 on his next test in order to maintain his average score at an 85. This is because if you add up 63, 84, 96, and 97 you get 340. When you divide 340 by the 4 test scores you get an average of exactly 85