document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=560320>Question 560320</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a person drives from town a to town b at the rate of 50 mph and then flies back at the rate of 160mph.  if the total traveling time is 21 hours, how far is it from town a to town b?\r<BR>\n" );
document.write( "\n" );
document.write( "i have to use the formula d=r*t to set up an equation\r<BR>\n" );
document.write( "\n" );
document.write( "my table i set up is\r<BR>\n" );
document.write( "\n" );
document.write( "                    t       *      s(r)   =    d   <BR>\n" );
document.write( "slower speed        50D            50          d\r<BR>\n" );
document.write( "\n" );
document.write( "faster speed      (160+21)         160+21      d\r<BR>\n" );
document.write( "\n" );
document.write( "total                21\r<BR>\n" );
document.write( "\n" );
document.write( "can you please help me solve this?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #363831 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=363831\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+ ALIGN=MIDDLE  ALT=\"+t+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = time to drive from a to b<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+21+-+t+ ALIGN=MIDDLE  ALT=\"+21+-+t+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = time to fly from b to a<BR>\n" );
document.write( "Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+ ALIGN=MIDDLE  ALT=\"+d+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = distance between a and b<BR>\n" );
document.write( "----------<BR>\n" );
document.write( "From a to b:<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+50t+ ALIGN=MIDDLE  ALT=\"+d+=+50t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "From b to a:<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+160%2A%28+21+-+t+%29+ ALIGN=MIDDLE  ALT=\"+d+=+160%2A%28+21+-+t+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "---------------------<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+3360+-+160t+ ALIGN=MIDDLE  ALT=\"+d+=+3360+-+160t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Substitute (1) into (2)<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+50t+=+3360+-+160t+ ALIGN=MIDDLE  ALT=\"+50t+=+3360+-+160t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+210t+=+3360+ ALIGN=MIDDLE  ALT=\"+210t+=+3360+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+16+ ALIGN=MIDDLE  ALT=\"+t+=+16+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "and, since<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+50t+ ALIGN=MIDDLE  ALT=\"+d+=+50t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+50%2A16+ ALIGN=MIDDLE  ALT=\"+d+=+50%2A16+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+800+ ALIGN=MIDDLE  ALT=\"+d+=+800+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "It is 800 mi between the towns<BR>\n" );
document.write( "---------------<BR>\n" );
document.write( "Your table could have entries<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+50 ALIGN=MIDDLE  ALT=\"+50\"   DISABLED_style= \"max-width:90%; height:auto;\" > mi/hr, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+160+ ALIGN=MIDDLE  ALT=\"+160+\"   DISABLED_style= \"max-width:90%; height:auto;\" > mi/hr, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t+ ALIGN=MIDDLE  ALT=\"t+\"   DISABLED_style= \"max-width:90%; height:auto;\" >, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+21+-+t+ ALIGN=MIDDLE  ALT=\"+21+-+t+\"   DISABLED_style= \"max-width:90%; height:auto;\" >,  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+ ALIGN=MIDDLE  ALT=\"+d+\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );