document.write( "Question 921137: I have an 84.7 average in a class. Tests are 50% of our grade, what is the lowest I can get on a test in order to keep my 85 average. \n" ); document.write( "
Algebra.Com's Answer #558726 by jim_thompson5910(35256)\"\" \"About 
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0.5*0.847 + 0.5x = 0.85\r
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\n" ); document.write( "\n" ); document.write( "0.4235 + 0.5x = 0.85\r
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\n" ); document.write( "\n" ); document.write( "0.5x = 0.85 - 0.4235\r
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\n" ); document.write( "\n" ); document.write( "0.5x = 0.4265\r
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\n" ); document.write( "\n" ); document.write( "x = 0.4265/0.5\r
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\n" ); document.write( "\n" ); document.write( "x = 0.853\r
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\n" ); document.write( "\n" ); document.write( "You need to get an 85.3% on the test (lowest you can go) to keep your 85% average.
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