document.write( "Question 938975: A STUDENT RECEVIES GRADES OF 84,79 AND 82 ON HER FIRST CHEMISTRY TEST. WHAT GRADE MUST SHE MUST SHE GET ON HER NEXT TEST TO RAISE HER AVERAGE TO 85 ? PLEASE EXPLAIN NEED HELP \n" ); document.write( "

Algebra.Com's Answer #572115 by josmiceli(19441) $\"\"$ $\"About$

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( average grade ) = ( sum of grades ) / ( number of tests )
\n" ); document.write( "Let $\"+x+\"$ = the grade on her next test
\n" ); document.write( " $\"+85+=+%28+84+%2B+79+%2B+82+%2B+x+%29+%2F+4+\"$
\n" ); document.write( " $\"+84+%2B+79+%2B+82+%2B+x+=+4%2A85+\"$
\n" ); document.write( " $\"+x+%2B+245+=+340+\"$
\n" ); document.write( " $\"+x+=+95+\"$
\n" ); document.write( "She must get a 95 on her final test
\n" ); document.write( " \n" ); document.write( "

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