document.write( "Question 603375: Hello,\r
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document.write( "My average is 77.6. My final counts as 20%. What is the worst I can make on the test and pass with a 70% average? I calculated 44. Thank you for answering my question. \n" );
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Algebra.Com's Answer #380686 by AnlytcPhil(1809) You can put this solution on YOUR website! \r\n" ); document.write( "Sorry, 44 will only pull the 77.6 grade down to 70.88, so 44\r\n" ); document.write( "is not the worst you can make and still end up with a 70. \r\n" ); document.write( "\r\n" ); document.write( "Since the exam counts 20%, the average of 77.6 counts 80%\r\n" ); document.write( "\r\n" ); document.write( "So the equation is:\r\n" ); document.write( "\r\n" ); document.write( "(.80)(77.6) + (.20)x = 70\r\n" ); document.write( "\r\n" ); document.write( " 62.08 + .2x = 70\r\n" ); document.write( " .2x = 70 - 62.08\r\n" ); document.write( " .2x = 7.92\r\n" ); document.write( " x = 39.6\r\n" ); document.write( "\r\n" ); document.write( "That's the worst you can do on the final exam. [But if you can make\r\n" ); document.write( "an 89.6 you can pull your grade up to 80.]\r\n" ); document.write( "\r\n" ); document.write( "Edwin\n" ); document.write( " |