document.write( "Question 842190: On the first 3 quizzes of her chemistry class, Stephanie got an average score of 88.\r
\n" ); document.write( "\n" ); document.write( "What does she need on the next quiz to have an overall average of 91?
\n" ); document.write( "

Algebra.Com's Answer #507428 by LinnW(1048)\"\" \"About 
You can put this solution on YOUR website!
Set x equal the score needed
\n" ); document.write( "\"%2888%2B88%2B88%2Bx%29%2F4+=+91\"
\n" ); document.write( "\"%28264%2Bx%29%2F4+=+91\"
\n" ); document.write( "multiply each side by 4
\n" ); document.write( "264 + x = 364
\n" ); document.write( "add -264 to each side
\n" ); document.write( "x = 100
\n" ); document.write( "
\n" ); document.write( "
\n" );