document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=585030>Question 585030</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A telephone company offers you an opportunity to sell prepaid, 30 minute long-distance phone cards. You will have to pay the company a one-time set-up fee of $200. Each phone card will cost you $5.70. How many cards would you have to sell before your average total cost per card falls to $8? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #373041 by </B><A HREF=/tutors/aboutme.mpl?userid=richwmiller><B>richwmiller(17219)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richwmiller><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=richwmiller><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=373041\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> y=mx+b<BR>\n" );
document.write( "y=mx+200<BR>\n" );
document.write( "y=5.70x+200<BR>\n" );
document.write( "8x=5.7x+200<BR>\n" );
document.write( "2.3x=200<BR>\n" );
document.write( "x=86.95<BR>\n" );
document.write( "so you have to sell 87 cards to get the average cost down to 8 dollars each<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );