document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=892744>Question 892744</A>: <I><SPAN STYLE=\"word-break: break-all;\"> This is a cost-revenue word problem. I tried using the form C=Rx+b which just confused me more. A rental company offers two plans. Plan I offers $10 a day and 10 cents a mile, while Plan II charges 14 cents a day, but no flat fee. If you were to drive 300 miles a day, which plan is better? For what mileage are both rates equal? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #540807 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><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=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=540807\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> plan 1 costs 10 dollars a day plus 10 cents a mile.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "the formula for plan 1 is c = .10 * 300 + 10 = 40 dollars.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "plan 2 costs 0 dollars a day plus 14 cents a mile.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "the formula for plan 2 is c = .14 * 300 = 42 dollars.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "plan 1 is cheaper because the total cost for plan 1 is 40 dollars while the total cost for plan 2 is 42 dollars.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "the formula c = rx + b works but you have to be careful what gets assigned to what.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "for plan 1, r = .10 and x = 300 and b = 10<BR>\n" );
document.write( "for plan 2, r = .14 and x = 300 and b = 0\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "note that if you had rented for more than a day, the formula would have had to have been c = rx + by<BR>\n" );
document.write( "r would be the cost per mile.<BR>\n" );
document.write( "x would be the number of miles.<BR>\n" );
document.write( "b would be the cost per day.<BR>\n" );
document.write( "y would be the number of days.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );