document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=877648>Question 877648</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a certain journey took 40 min to complete. if half of the distance was travelled at an average speed of 100 km/h and the other half at an average speed of 60 km/h, what was the length of the journey? i tried 180 km/h divided by 2 and then i got lost </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #529463 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39617)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=529463\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> RT=D  rate, time, distance.\r<BR>\n" );
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document.write( "Distance is unknown.<BR>\n" );
document.write( "Let d = journey distance.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=40%2Ax=d%2F2 ALIGN=MIDDLE  ALT=\"40%2Ax=d%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" > and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=100%2Ay=d%2F2 ALIGN=MIDDLE  ALT=\"100%2Ay=d%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" > using x and y as the times for first half and second half of the journey distance.  ALSO, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2By=40%2F60 ALIGN=MIDDLE  ALT=\"x%2By=40%2F60\"   DISABLED_style= \"max-width:90%; height:auto;\" >, since we could or should keep in units of time as hours.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=40x=100y ALIGN=MIDDLE  ALT=\"40x=100y\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4x=10y ALIGN=MIDDLE  ALT=\"4x=10y\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2x=5y ALIGN=MIDDLE  ALT=\"2x=5y\"   DISABLED_style= \"max-width:90%; height:auto;\" >, from the R, T, D reationships.<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2By=2%2F3 ALIGN=MIDDLE  ALT=\"x%2By=2%2F3\"   DISABLED_style= \"max-width:90%; height:auto;\" >, simplified form of the given time sum.<BR>\n" );
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document.write( "Solve the system for x and y:<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%282x=5y%29 ALIGN=MIDDLE  ALT=\"highlight_green%282x=5y%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > AND <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%28x%2By=2%2F3%29 ALIGN=MIDDLE  ALT=\"highlight_green%28x%2By=2%2F3%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "When you know x and y, which are in HOURS, you can then find the journey's distance. </SPAN>\n" );
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