document.write( "Question 933154: if I have a 90 percent average what do I need to get on my final to finish with an 80 percent when the final is worth 20% of the final grade? \n" ); document.write( "
Algebra.Com's Answer #566647 by KMST(5328)\"\" \"About 
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\"x\"= percentage points on the final
\n" ); document.write( "Weighted Average=\"0.80%2A90%2B0.20x=80\"--->\"72%2B0.2x=80\"--->\"0.2x=80-72\"--->\"0.2x=8\"--->\"x=8%2F0.2\"--->\"x=40\"
\n" ); document.write( "If you score 40% in a final worth 20% of the grade,
\n" ); document.write( "and the weighted average of the rest of your grades is 90%,
\n" ); document.write( "you will end up with a final grade of 80%.
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