document.write( "Question 463421: In a certain course, Amy received an average (arithmetic mean) score of 84 for her first 2 tets, 78 for her third test, and 94 for her fourth test. What grade must she receive on her next test if she wants an average of 87 for all 5 tests? \n" ); document.write( "
Algebra.Com's Answer #317527 by alicealc(293)\"\" \"About 
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(84 * 2 + 78 + 94 + x)/5 = 87
\n" ); document.write( "168 + 78 + 94 + x = 87 * 5
\n" ); document.write( "340 + x = 435
\n" ); document.write( "x = 435 - 340 = 95\r
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\n" ); document.write( "\n" ); document.write( "so, she must receive 95 for the next test
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