SOLUTION: I have a 95%, my final exam is worth 90% of my grade with 115 questions, what do I need to make to pass with an 80%?

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Question 585349: I have a 95%, my final exam is worth 90% of my grade with 115 questions, what do I need to make to pass with an 80%?
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
0.1*0.95 + 0.9x = 0.8

0.095 + 0.9x = 0.8

0.9x = 0.8-0.095

0.9x = 0.705

x = 0.705/0.9

x = 0.78333333333333

So you need to make a 78.333% to pass with an 80%.
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