document.write( "Question 776764: the average of 5 numbers is 10. the first four numbers are 8, 9, 10, 11. find the fifth number \n" ); document.write( "
Algebra.Com's Answer #473702 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! the average of 5 numbers is 10. the first four numbers are 8, 9, 10, 11. find the fifth number \n" ); document.write( "----- \n" ); document.write( "Let the 5th number be \"x\": \n" ); document.write( "------ \n" ); document.write( "Equation: \n" ); document.write( "(8+9+10+11+x)/5 = 10 \n" ); document.write( "----- \n" ); document.write( "(38+x) = 50 \n" ); document.write( "x = 12 \n" ); document.write( "=============== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " |