document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=465940>Question 465940</A>: <I><SPAN STYLE=\"word-break: break-all;\"> how can i calculate average speed<BR>\n" );
document.write( "when a plane is flying from one city to another and is 550 miles per hour and is 430 miles per hour on the return flight. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #319431 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=319431\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> calculate average speed when a plane is flying from one city to another and<BR>\n" );
document.write( " is 550 miles per hour and is 430 miles per hour on the return flight.<BR>\n" );
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document.write( "Let a = the average speed for the round trip<BR>\n" );
document.write( "Let d = the one-way dist<BR>\n" );
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document.write( "Write a time equation: time = dist/speed<BR>\n" );
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document.write( "outbound time + return time = total time<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%2F550 ALIGN=MIDDLE  ALT=\"d%2F550\"   DISABLED_style= \"max-width:90%; height:auto;\" > + <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%2F430 ALIGN=MIDDLE  ALT=\"d%2F430\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%282d%29%2Fa ALIGN=MIDDLE  ALT=\"%282d%29%2Fa\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Actually we don't need d, just put it in here to illustrate what we are doing here<BR>\n" );
document.write( "Divide thru by d, and we have:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F550 ALIGN=MIDDLE  ALT=\"1%2F550\"   DISABLED_style= \"max-width:90%; height:auto;\" > + <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F430 ALIGN=MIDDLE  ALT=\"1%2F430\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%2Fa ALIGN=MIDDLE  ALT=\"2%2Fa\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Multiply by 23650a to clear the denominators, results<BR>\n" );
document.write( "43a + 55a = 47300<BR>\n" );
document.write( "98a = 47300<BR>\n" );
document.write( "a = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=47300%2F98 ALIGN=MIDDLE  ALT=\"47300%2F98\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "a = 482.653 mph is the average speed<BR>\n" );
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document.write( "You can confirm this solution by choosing a value for d and finding the total of the actual times.<BR>\n" );
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