document.write( "Question 462610: The average of numbers are 8. So if three of the numbers are 4, 8, and 9 what is the fourth number? 11 or 12? \n" ); document.write( "
Algebra.Com's Answer #317095 by rfer(16322)\"\" \"About 
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(4+8+9+x)/4=8
\n" ); document.write( "21+x=8*4
\n" ); document.write( "21+x=32
\n" ); document.write( "x=11
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