document.write( "Question 21813: IF A CUSTOMER PAYS WITH A $100 BILL, THE CHANGE IS DEPENDENT ON HOW MANY CD'S ARE BEING PURCHASED. WRITE A FUNCION RULE TO SHOW HOW MANY CHANGE IS GIVEN IF EACH CD COSTS $9. \n" ); document.write( "
Algebra.Com's Answer #11716 by rapaljer(4671)\"\" \"About 
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Let x = number of CD's purchased at $9.\r
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\n" ); document.write( "\n" ); document.write( "Total cost of the CD's = 9x\r
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\n" ); document.write( "\n" ); document.write( "The change is 100 - 9x\r
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\n" ); document.write( "\n" ); document.write( "R^2 at SCC
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