document.write( "Question 816673: If 85% of the years tests are over and my average is 63%, and my end of year exam is worth 15% of my grade, what score do I need to keep my average at 63% \n" ); document.write( "

Algebra.Com's Answer #491666 by Theo(13342) $\"\"$ $\"About$

You can put this solution on YOUR website!
the formula is:
\n" ); document.write( ".85 * 63% + .15 * x = 63%
\n" ); document.write( "solve for x to get:
\n" ); document.write( "x = (63% - .85*63%) / .15 which results in:
\n" ); document.write( "x = 63%\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "if you want to raise your score to 65%, then the formula would be:
\n" ); document.write( ".85 * 63% + .15 * x = 65%
\n" ); document.write( "solve for x to get:
\n" ); document.write( "x = (65% - .85 * 63%) / .15 which results in:
\n" ); document.write( "x = 76.333333333%\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "the best you can do is if you get 100% on the final.
\n" ); document.write( "then your overall average would be:
\n" ); document.write( ".85 * 63% + .15 * 100% = 68.55% \n" ); document.write( "

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