document.write( "Question 820062: If my class average is 83.6 what do I need on my final (that's worth 20%) to get a B? Let's say above 80% \n" ); document.write( "
Algebra.Com's Answer #493374 by jerryguo41(197)\"\" \"About 
You can put this solution on YOUR website!
class average w/o final = 80%\r
\n" ); document.write( "\n" ); document.write( "class average(worth)+final(worth)=final(worth)
\n" ); document.write( "\"83.6%280.8%29%2Bx%280.2%29=80%281.00%29\"
\n" ); document.write( "\"66.88%2B0.2x=80\"
\n" ); document.write( "\"0.2x=13.12\"
\n" ); document.write( "\"x=65.6\"\r
\n" ); document.write( "\n" ); document.write( "You will need a 65.6% to keep a B average
\n" ); document.write( "
\n" );