document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=875169>Question 875169</A>: <I><SPAN STYLE=\"word-break: break-all;\"> When driven out of town the car runs x+4 km on each liter of petrol. It uses 5 litres less petrol to go 200 km out of town than to go 200 km in town. Use this information to write down an equation involving x and show that it simplifies to x2+4x-160=0 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #528075 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39799)</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=528075\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Uniform rates involving volume of fuel and distance.  FUEL EFFICIENCY is the rate and the route in one direction has some different conditions than in the other direction.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=R=D%2FV ALIGN=MIDDLE  ALT=\"R=D%2FV\"   DISABLED_style= \"max-width:90%; height:auto;\" >, unit is kilometers per liter.  Same as <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=RV=D ALIGN=MIDDLE  ALT=\"RV=D\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r<BR>\n" );
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document.write( "WAY__________Rate__________Distance__________Volume<BR>\n" );
document.write( "Out_________x+4_____________200______________v-5<BR>\n" );
document.write( "In___________r______________200______________v\r<BR>\n" );
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document.write( "We can use the fundamental relation rule to express r better:\r<BR>\n" );
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document.write( "WAY__________Rate__________Distance__________Volume<BR>\n" );
document.write( "Out_________x+4_____________200______________v-5<BR>\n" );
document.write( "In___________200/v__________200______________v\r<BR>\n" );
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document.write( "Nothing more is possible from this data.  Clearly the two routes differ because the fuel volumes are not equal for the same path or road; and the fuel efficiency rates cannot be equal:  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2B4%3C%3E200%2Fv ALIGN=MIDDLE  ALT=\"x%2B4%3C%3E200%2Fv\"   DISABLED_style= \"max-width:90%; height:auto;\" >.<BR>\n" );
document.write( "More information is needed.  Do you see a way to obtain a quadratic equation in only x? </SPAN>\n" );
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