document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=246664>Question 246664</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A train travels 600 kilometers in the same time that a truck travels 520 kilometers. Find the speed of the train if the train's average speed is 8 kilometers per hour faster than the truck's. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #180046 by </B><A HREF=/tutors/aboutme.mpl?userid=rapaljer><B>rapaljer(4671)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rapaljer><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=rapaljer><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=180046\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let x= rate of the truck<BR>\n" );
document.write( "x+8= rate of the train<BR>\n" );
document.write( "520 = distance of truck<BR>\n" );
document.write( "600= distance of train\r<BR>\n" );
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document.write( "Time of Truck = Time of Train<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=520%2Fx=600%2F%28x%2B8%29 ALIGN=MIDDLE  ALT=\"520%2Fx=600%2F%28x%2B8%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Since <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a%2Fb=c%2Fd ALIGN=MIDDLE  ALT=\"a%2Fb=c%2Fd\"   DISABLED_style= \"max-width:90%; height:auto;\" > means that <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=ad=bc ALIGN=MIDDLE  ALT=\"ad=bc\"   DISABLED_style= \"max-width:90%; height:auto;\" >,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=520%2Fx=600%2F%28x%2B8%29 ALIGN=MIDDLE  ALT=\"520%2Fx=600%2F%28x%2B8%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > means that <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=520%2A%28x%2B8%29=600%2Ax%29 ALIGN=MIDDLE  ALT=\"520%2A%28x%2B8%29=600%2Ax%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "520x+520*8=600x\r<BR>\n" );
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document.write( "Subtract 520x from each side:<BR>\n" );
document.write( "520*8=80x<BR>\n" );
document.write( "52=x\r<BR>\n" );
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document.write( "So, x= 52 km/hr = speed of truck<BR>\n" );
document.write( "x+8= 60 km/hr = speed of train\r<BR>\n" );
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document.write( "Check:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=520%2F52=600%2F60 ALIGN=MIDDLE  ALT=\"520%2F52=600%2F60\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "It checks!\r<BR>\n" );
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document.write( "a) If x=6, then A=x^2 + 6x +8<BR>\n" );
document.write( "A=6^2 +6*6+8<BR>\n" );
document.write( "A=36+36+8<BR>\n" );
document.write( "A= 80 square units\r<BR>\n" );
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document.write( "b) If A=x^2 +6x+8<BR>\n" );
document.write( "A=(x+2)(x+4)\r<BR>\n" );
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document.write( "A= W*L<BR>\n" );
document.write( "If x+2 = width, then L=x+4.\r<BR>\n" );
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document.write( "Dr. Robert J. Rapalje, Retired<BR>\n" );
document.write( "Seminole State College of Florida<BR>\n" );
document.write( "Altamonte Springs Campus\r<BR>\n" );
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document.write( " </SPAN>\n" );
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