document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=991582>Question 991582</A>: <I><SPAN STYLE=\"word-break: break-all;\"> For this Exercise, assume that a linear equation models each situation.\r<BR>\n" );
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document.write( "Cell-Phone Charges. The total cost of Tam's cell phone was $410 after 5 months of service and $690 after 9 months. What costs had Tam already incurred when her service just began? Assume that Tam's monthly charge is constant.\r<BR>\n" );
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document.write( "My answer was $70. The book's answer was $60. Am I right or wrong? Please help me if I'm wrong. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #611460 by </B><A HREF=/tutors/aboutme.mpl?userid=rothauserc><B>rothauserc(4718)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rothauserc><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=rothauserc><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=611460\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> (690 - 410) / 4 = 70, therefore<BR>\n" );
document.write( "Tam's cell phone bill is $70 per month, then<BR>\n" );
document.write( "690 - (9*70) = 60, therefore<BR>\n" );
document.write( "Tam incurred $60 in charges when her service began<BR>\n" );
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