document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=574655>Question 574655</A>: <I><SPAN STYLE=\"word-break: break-all;\"> You are driving a transport truck on a 300 mile trip. You drive at 60 miles per hour for the first 100 miles, then at 65 miles per hour for the last 200 miles. What is your average speed for the entire trip? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #369218 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=369218\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> You are driving a transport truck on a 300 mile trip.<BR>\n" );
document.write( " You drive at 60 miles per hour for the first 100 miles, then at 65 miles per hour for the last 200 miles.<BR>\n" );
document.write( " What is your average speed for the entire trip<BR>\n" );
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document.write( "let a = average for the entire trip<BR>\n" );
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document.write( "Write a time equation, time = dist/speed<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=100%2F60 ALIGN=MIDDLE  ALT=\"100%2F60\"   DISABLED_style= \"max-width:90%; height:auto;\" > + <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=200%2F65 ALIGN=MIDDLE  ALT=\"200%2F65\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=300%2Fa ALIGN=MIDDLE  ALT=\"300%2Fa\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Multiply by 3900a, (60*65)<BR>\n" );
document.write( "3900a*<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=100%2F60 ALIGN=MIDDLE  ALT=\"100%2F60\"   DISABLED_style= \"max-width:90%; height:auto;\" > + 3900a<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=200%2F65 ALIGN=MIDDLE  ALT=\"200%2F65\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 3900a*<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=300%2Fa ALIGN=MIDDLE  ALT=\"300%2Fa\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "cancel the denominators<BR>\n" );
document.write( "65a(100) + 60a(200) = 3900(300)<BR>\n" );
document.write( "6500a + 12000a = 1170000<BR>\n" );
document.write( "18500a = 1170000<BR>\n" );
document.write( "a = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1170000%2F18500 ALIGN=MIDDLE  ALT=\"1170000%2F18500\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "a = 63.24 mph is the average speed<BR>\n" );
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document.write( "Check solution using decimals<BR>\n" );
document.write( "100/60 = 1.67 hrs<BR>\n" );
document.write( "200/65 = 3.08<BR>\n" );
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document.write( "300/63.24 = 4.74, close enough to check it. </SPAN>\n" );
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