document.write( "Question 832339: if I made a 78, 65, 82, 91, and an 88 on my last five tests what do I need to make on the next one to have an average of a 77? \n" ); document.write( "

Algebra.Com's Answer #501970 by thejackal(72) $\"\"$ $\"About$

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lets call the sixth test result n
\n" ); document.write( "((78+65+82+91+88)+n)/6 = 77\r
\n" ); document.write( "\n" ); document.write( "(404+n)/6 = 77
\n" ); document.write( "404+n = 462
\n" ); document.write( "n = 462 - 404 = 58\r
\n" ); document.write( "\n" ); document.write( "you need exactly 58 marks/score on your sixth test to make an average of 77
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