document.write( "Question 246318: If your average is a 88 what's the lowest grade you can make on a test to keep your average a b? \n" ); document.write( "
Algebra.Com's Answer #179918 by Theo(13342)![]() ![]() You can put this solution on YOUR website! if you assume a B average is 80, and if the weighting for all the tests is equal and you are only talking about 2 tests, then:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "(x + 88)/2 = 80\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "multiply both sides of this equation by 2 to get:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "x + 88 = 160\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "subtract 88 from both sides of this equation to get:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "x = 160-88 = 72\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "lowest score you can get is 72 to keep an 80 average.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "72 + 88 = 160/2 = 80\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |