SOLUTION: the students wants to get an A (90%) in the class for the semester. if they have one more test to take, is this possible with the given six text scores (87, 100, 71, 78, 71,65)

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Question 829877: the students wants to get an A (90%) in the class for the semester. if they have one more test to take, is this possible with the given six text scores (87, 100, 71, 78, 71,65)
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Find the average with S being the score on the last test which makes for a total of 7 tests.
%2887%2B100%2B71%2B78%2B71%2B65%2BS%29%2F7%3E=90
87%2B100%2B71%2B78%2B71%2B65%2BS%3E=630
Now solve for S.
If its less than or equal to 100, it's still possible.