document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=25294>Question 25294</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hi I am stuck on a problem I was wondering if u could help \r<BR>\n" );
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document.write( "Music club A has a $30 membership fee and charges $8 per CD. Music club B has a $45 membership fee and charges $7 per CD. How many CDs would a person need to buy for club A to be the more expensive? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #13597 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=13597\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> first find:<BR>\n" );
document.write( "A fee + (cost/CD) x # CDs<BR>\n" );
document.write( "B fee + (cost/CD) x # CDs<BR>\n" );
document.write( "30 + 8 x #CDs<BR>\n" );
document.write( "45 + 7 x #CDs<BR>\n" );
document.write( "when does A become more expensive?<BR>\n" );
document.write( "first find when they are equally expensive<BR>\n" );
document.write( "30 + 8n = 45 + 7n<BR>\n" );
document.write( "n = 15<BR>\n" );
document.write( "when n = 15, A club costs $150<BR>\n" );
document.write( "B club costs $150<BR>\n" );
document.write( "suppose n = 16<BR>\n" );
document.write( "A club costs 30 + 8 x 16 = $158<BR>\n" );
document.write( "B club costs 45 + 7 x 16 = $157<BR>\n" );
document.write( "16  CDs is the answer<BR>\n" );
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