document.write( "Question 176906This question is from textbook Elementary and intermediate algebra
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\n" ); document.write( "Candice had scores of 95, 82, 93 and 84 on her first four exams of the semester. What score must she obtain on the fifth exam to have an average of 90 or better for the 5 exams. How do you set this problem up? THanks
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Algebra.Com's Answer #131961 by Edwin McCravy(20056)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "1st score = 95\r\n" );
document.write( "2nd score = 82\r\n" );
document.write( "3rd score = 93\r\n" );
document.write( "4th score = 84\r\n" );
document.write( "5th score = x\r\n" );
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document.write( "Add them up and divide by 5\r\n" );
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document.write( "\"%2895%2B82%2B93%2B84%2Bx%29%2F5\"\r\n" );
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document.write( "Set that greater than or equal to the desired average, 90\r\n" );
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document.write( "\"matrix%281%2C1%2C+%2895%2B82%2B93%2B84%2Bx%29%2F5+%3E=+90%29\"\r\n" );
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document.write( "Simplify the numerator on the left:\r\n" );
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document.write( "\"matrix%281%2C1%2C+%28354%2Bx%29%2F5+%3E=+90%29\"\r\n" );
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document.write( "Multiply both sides by LCD of \"5\" to \r\n" );
document.write( "clear of fractions:\r\n" );
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document.write( "\"matrix%281%2C1%2C+5%28%28354%2Bx%29%2F5%29%3E=+5%2890%29%29\"\r\n" );
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document.write( "Cancel \"5\"'s on the left, multiply on\r\n" );
document.write( "the right:\r\n" );
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document.write( "\"matrix%281%2C1%2C+cross%285%29%28%28354%2Bx%29%2Fcross%285%29%29%3E=+450%29\"\r\n" );
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document.write( "\"matrix%281%2C1%2C+354%2Bx+%3E=+450%29\"\r\n" );
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document.write( "\"matrix%281%2C1%2C+x%3E=+96%29%29\"\r\n" );
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document.write( "So it'll take a score equal to or greater than 96 \r\n" );
document.write( "on the 5th test to bring Candice's average up to 90.\r\n" );
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document.write( "Edwin
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