document.write( "Question 908286: A student has a mean average grade of 89 on 9 tests. What must she make on the tenth test to have an average of 90?
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Algebra.Com's Answer #550947 by richwmiller(17219)![]() ![]() You can put this solution on YOUR website! He missed 90 nine times \n" ); document.write( " He needs 90+9 to get an average of 90 \n" ); document.write( " |