document.write( "Question 878434: A student got a 73, 91, 84, and 90 on his tests. What is the minimum grade he must get to have an average of 85? \n" ); document.write( "
Algebra.Com's Answer #530030 by JulietG(1812)\"\" \"About 
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Assuming there are 5 tests of equal value...
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\n" ); document.write( "So far, he has 338 points (73+91+84+90)
\n" ); document.write( "To have an average of 85, he needs .85 * 500 possible points, or 425
\n" ); document.write( "425 - the 338 points he already has = 87
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