document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=157645>Question 157645</A>: <I><SPAN STYLE=\"word-break: break-all;\"> this is is kinda confusing, need your help guys.\r<BR>\n" );
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document.write( "alan and dave leave from the same point driving in opposite directions, alan driving at 55 miles pero hour and dave at 65 miles per hour. alan has a one hour head start. how long will they be able to talk on their phones if the phones have a  250 mile range? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #116211 by </B><A HREF=/tutors/aboutme.mpl?userid=ptaylor><B>ptaylor(2198)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ptaylor><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=ptaylor><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=116211\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> OK<BR>\n" );
document.write( "Distance(d) equals Rate(r) times Time(t) or d=rt;  r=d/t and t=d/r\r<BR>\n" );
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document.write( "So, before Dave gets started, Alan has already driven 55*1 or 55 miles (and they have talked an hour on their phones)\r<BR>\n" );
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document.write( "Let t=time it takes them to get 250 mi apart after Dave leaves\r<BR>\n" );
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document.write( "Total distance Alan drives 55+55t<BR>\n" );
document.write( "Total distance Dave drives=65t\r<BR>\n" );
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document.write( "Now when the above two distances add up to 250 mi, they will be at the outer limits of phone reception, so:<BR>\n" );
document.write( "55+55t+65t=250 subtract 55 from each side<BR>\n" );
document.write( "55-55+65t+55t=250-55  collect like terms<BR>\n" );
document.write( "120t=195  divide each side by 120<BR>\n" );
document.write( "t= 1 5/8 hr or 1hr 37.5 min--------time it takes to get 250 mi apart after Dave leaves\r<BR>\n" );
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document.write( "Time that they can talk on the phone is the 1 hour that Alan was driving alone plus the 1 5/8 hour that the were both driving and this equals 2 5/8 hrs\r<BR>\n" );
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document.write( "Hope this helps---ptaylor </SPAN>\n" );
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