document.write( "Question 1045249: If I have an 77, 82, 72, 63, 90, what grade do I need on the final to have an 80 average? \n" ); document.write( "
Algebra.Com's Answer #660659 by Boreal(15235)\"\" \"About 
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average=total/n
\n" ); document.write( "an 80 average for six tests (five have been taken so far)
\n" ); document.write( "80=total/6
\n" ); document.write( "multiply both sides by 6, and the total needed is 80*6=480
\n" ); document.write( "The current total is 77+82+72+63+90=384
\n" ); document.write( "you need 480
\n" ); document.write( "480-384=96
\n" ); document.write( "You need a 96
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\n" ); document.write( "Check
\n" ); document.write( "the first test is -3 from 80
\n" ); document.write( "the second is +2
\n" ); document.write( "the third is -8
\n" ); document.write( "the fourth is -17
\n" ); document.write( "the fifth is +10
\n" ); document.write( "The minuses add to -28, the pluses to +12. You are -16 and need +16 (above 80, which is 96) to get an average of 80
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