document.write( "Question 251071: Mike's average on five tests are 84,80,76,96,and 80. What must mike score on his sixth test so that his average will be 85? \n" ); document.write( "
Algebra.Com's Answer #182846 by checkley77(12844)![]() ![]() ![]() You can put this solution on YOUR website! 84,80,76,96,and 80 \n" ); document.write( "(84+80+76+96+80+X)/6=85 \n" ); document.write( "(416+X)/6=80 CROSS MULTIPLY. \n" ); document.write( "416+X=480 \n" ); document.write( "X=480-416 \n" ); document.write( "X=64 IS THE REQUIRED TEST SCORE ON THE LAST TEST TO MAINTAIN AN AVERAGE OF 80.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |