document.write( "Question 743338: A student has an 83 average. Her final exam will count as 1/3 of her grade. What does she need to make on her final to pass the class with a 70 average? \n" ); document.write( "
Algebra.Com's Answer #452860 by Edwin McCravy(20060)\"\" \"About 
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A student has an 83 average. Her final exam will count as 1/3 of her grade. What does she need to make on her final to pass the class with a 70 average?
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document.write( "Her final exam will count as 1/3 of her grade.  Therefore,\r\n" );
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document.write( "her 83 average will count as 2/3 of her grade.\r\n" );
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document.write( "Let x = her final exam grade\r\n" );
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document.write( "Then,\r\n" );
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document.write( "\"%28matrix%285%2C1%2C%0D%0A%0D%0A2%2F3%2Ctimes%2Cher%2C83%2Caverage%29%29\"\"%22%22%2B%22%22\"\"%28matrix%286%2C1%2C%0D%0A%0D%0A1%2F3%2Ctimes%2Cher%2Cx%2Cexam%2Cgrade%29%29\"\"%22%22=%22%22\"\"70\"\r\n" );
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document.write( "     \"expr%282%2F3%29%2A83\"\"%22%22%2B%22%22\"\"expr%281%2F3%29x\"\"%22%22=%22%22\"\"70\"\r\n" );
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document.write( "Multiply every term by LCD = 3\r\n" );
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document.write( "     \"3%2Aexpr%282%2F3%29%2A83\"\"%22%22%2B%22%22\"\"3%2Aexpr%281%2F3%29x\"\"%22%22=%22%22\"\"3%2A70\"\r\n" );
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document.write( "     \"cross%283%29%2Aexpr%282%2Fcross%283%29%29%2A83\"\"%22%22%2B%22%22\"\"cross%283%29%2Aexpr%281%2Fcross%283%29%29x\"\"%22%22=%22%22\"\"210\"\r\n" );
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document.write( "     \"2%2A83\"\"%22%22%2B%22%22\"\"x\"\"%22%22=%22%22\"\"210\"\r\n" );
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document.write( "     166 + x = 210\r\n" );
document.write( "           x = 44\r\n" );
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document.write( "Edwin
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