document.write( "Question 1124814: Four kids took a math test and gathered an average of a 75. Jenny had a score 10 more than Alex and 25 more than Nick. Lynn had a score of 86 and was the highest score out of the four. What is Jenny's score?
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Algebra.Com's Answer #741117 by math_helper(2461)![]() ![]() You can put this solution on YOUR website! \n" ); document.write( "Let J, A, N, L = scores for each person\r \n" ); document.write( "\n" ); document.write( "(1) (J+A+N+L)/4 = 75 —> J+A+N+L=300 \n" ); document.write( "(2) J=A+10 —> A = J-10 \n" ); document.write( "(3) J=N+25 —> N = J-25 \n" ); document.write( "(4) L=86 \r \n" ); document.write( "\n" ); document.write( "Using rightmost equations, substitute into (1) for A, N, and L:\r \n" ); document.write( "\n" ); document.write( "J+(J-10)+(J-25)+86 = 300 \r \n" ); document.write( "\n" ); document.write( "You can solve this for J and you are done. \r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "I got J=83, A=73, N=58 (and with L=86, the average does check at 75)\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |