document.write( "Question 56720: Jon's final exam was given 5 times the weight of a weekly test. The average of 15 weekly tests was 87. The overall weighted average was 85. What grade did he make on the final? \n" ); document.write( "
Algebra.Com's Answer #38497 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! Let the score on the final be \"x\". \n" ); document.write( "Then: \n" ); document.write( "[15*87+5x]/20=85 \n" ); document.write( "[1305+5x]=1700 \n" ); document.write( "5x=395 \n" ); document.write( "x=79 \n" ); document.write( "His score on the final was 79 \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " |