document.write( "Question 759109: Jason has an average grade of 85 on his first 8 quizzes. After his 9th quiz, his average grade was 81. What grade did Jason get on his ninth quiz \n" ); document.write( "
Algebra.Com's Answer #461958 by Cromlix(4381)\"\" \"About 
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Average grade of 85 on 8 quizzes
\n" ); document.write( " 85*8 = 680
\n" ); document.write( "Average grade of 81 on 9 quizzes
\n" ); document.write( " = 81*9 = 729
\n" ); document.write( " = 729 - 680
\n" ); document.write( " = 49
\n" ); document.write( "So Jason scored 49 on his 9th quiz.
\n" ); document.write( "Hope this helps.
\n" ); document.write( ":-)
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