document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=288779>Question 288779</A>: <I><SPAN STYLE=\"word-break: break-all;\"> You are driving from Houston to San Antonio on Interstate 10.  You travel half the distance at 50 km/h and the other half at 92 km/h.  What is your average speed(km/h)? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #209285 by </B><A HREF=/tutors/aboutme.mpl?userid=richwmiller><B>richwmiller(17219)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richwmiller><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=richwmiller><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=209285\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> s=distance to San Antonio<BR>\n" );
document.write( "50x=s/2<BR>\n" );
document.write( "x=s/100<BR>\n" );
document.write( "92y=s/2<BR>\n" );
document.write( "y=s/184<BR>\n" );
document.write( "d/t=r<BR>\n" );
document.write( "(total distance)/(total time)=average rate<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s%2F%28s%2F100%2Bs%2F184%29 ALIGN=MIDDLE  ALT=\"s%2F%28s%2F100%2Bs%2F184%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >=64.79 kph\r<BR>\n" );
document.write( "\n" );
document.write( "not (92+50)/2<BR>\n" );
document.write( "not 142/2=71<BR>\n" );
document.write( "Why? Because he spent more time at 50 kph than at 92 kph<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );