document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=770019>Question 770019</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A race car is traveling 40 km/hour faster than another on a race track. While the faster car travels 70 km, the second travels 60 km. find the speed of the faster car in km/hr. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #469239 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=469239\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> One of the keys is , \"While the faster,... the second...\".  The amount of time is the same time interval.  Call the time quantity, x hours.\r<BR>\n" );
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document.write( "CAR_________RATE_________TIME__________DISTANCE<BR>\n" );
document.write( "Slow________r____________x_____________60<BR>\n" );
document.write( "Fast_______r+40__________x_____________70\r<BR>\n" );
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document.write( "Make expressions for x for each car using r*t=d:\r<BR>\n" );
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document.write( "CAR_________RATE_________TIME__________DISTANCE<BR>\n" );
document.write( "Slow________r____________60/r_____________60<BR>\n" );
document.write( "Fast_______r+40__________70/(r+40)_____________70\r<BR>\n" );
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document.write( "The time quantities being equal, we just show the equation:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=60%2Fr=70%2F%28r%2B40%29 ALIGN=MIDDLE  ALT=\"60%2Fr=70%2F%28r%2B40%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >  and solve for r.<BR>\n" );
document.write( "... and of course, r+40. </SPAN>\n" );
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