document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=522570>Question 522570</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A person travels by car from one city to another with different constant speeds between the cities. She drives 30 min at 80 km/hr, 12 min at 100 km/hr and 45 min at 40 km/hr. Determine the average speed for the trip and determine the distance between the initial and final cities along the trip. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #347072 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=347072\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A person travels by car from one city to another with different constant speeds between the cities. She drives 30 min at 80 km/hr, 12 min at 100 km/hr and 45 min at 40 km/hr.<BR>\n" );
document.write( " Determine the average speed for the trip and determine the distance between the initial and final cities along the trip.<BR>\n" );
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document.write( "Change minutes to hrs, divide by 60:<BR>\n" );
document.write( "30 min = .50 hrs<BR>\n" );
document.write( "45 min = .75 hrs<BR>\n" );
document.write( "12 min = .20 hrs<BR>\n" );
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document.write( "total  + 1.45 hrs, total travel time<BR>\n" );
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document.write( "let a = average speed for the trip<BR>\n" );
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document.write( "Write a dist equation, dist = speed * time<BR>\n" );
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document.write( "80(.5) + 100(.20) + 40(.75) = 1.45a<BR>\n" );
document.write( "40 + 20 + 30 = 1.45a<BR>\n" );
document.write( "90 = 1.45a<BR>\n" );
document.write( "a = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=90%2F1.45 ALIGN=MIDDLE  ALT=\"90%2F1.45\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "a = 62.069 km/h, for the entire trip<BR>\n" );
document.write( "and<BR>\n" );
document.write( "90 km is the total distance </SPAN>\n" );
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