SOLUTION: If your chemistry grades are 84, 86, and 88 for the first three marking periods, what do you need to score in the fourth marking period to obtain a 90 overall average?
Algebra ->
Average
-> SOLUTION: If your chemistry grades are 84, 86, and 88 for the first three marking periods, what do you need to score in the fourth marking period to obtain a 90 overall average?
Log On
Question 1064403: If your chemistry grades are 84, 86, and 88 for the first three marking periods, what do you need to score in the fourth marking period to obtain a 90 overall average? Answer by jorel1380(3719) (Show Source):
You can put this solution on YOUR website! To obtain a 90 overall average for 4 test, you need 90 x 4, or 360 total points. Thus far, you have 84+86+88=258 total points. 360-258=102 points needed to score on the 4th examination to average 90 points.
