document.write( "Question 929006: After five games of bowling, Ralphs average score was 91. After six games his average score was 89. What was his score in the sixth game ? \n" ); document.write( "

Algebra.Com's Answer #564051 by TimothyLamb(4379) $\"\"$ $\"About$

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x = sum of first five games' scores
\n" ); document.write( "y = score on sixth game
\n" ); document.write( "---
\n" ); document.write( "x/5 = 91
\n" ); document.write( "x = 91*5
\n" ); document.write( "---
\n" ); document.write( "(x + y)/6 = 89
\n" ); document.write( "x + y = 89*6
\n" ); document.write( "---
\n" ); document.write( "x + y = 89*6
\n" ); document.write( "91*5 + y = 89*6
\n" ); document.write( "y = 89*6 - 91*5
\n" ); document.write( "y = 79
\n" ); document.write( "---
\n" ); document.write( "answer:
\n" ); document.write( "y = score on sixth game = 79
\n" ); document.write( "---
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