SOLUTION: I have an 84.7 average in a class. Tests are 50% of our grade, what is the lowest I can get on a test in order to keep my 85 average.

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Question 921137: I have an 84.7 average in a class. Tests are 50% of our grade, what is the lowest I can get on a test in order to keep my 85 average.
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
0.5*0.847 + 0.5x = 0.85

0.4235 + 0.5x = 0.85

0.5x = 0.85 - 0.4235

0.5x = 0.4265

x = 0.4265/0.5

x = 0.853


You need to get an 85.3% on the test (lowest you can go) to keep your 85% average.