document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=648820>Question 648820</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Suppose a car drives on the freeway for 7 hours. In the first 3 hours, he travels at a constant<BR>\n" );
document.write( "speed. For the remaining part of the trip, he travels 10 mph faster than during the rst part<BR>\n" );
document.write( "of the drive. If he travelled 500 miles, how fast was he going during the rst part of the drive?\r<BR>\n" );
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document.write( "I just cant seem to come up with an equation, I need it explained. Any help would work thanks! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #406859 by </B><A HREF=/tutors/aboutme.mpl?userid=MathTherapy><B>MathTherapy(10557)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=MathTherapy><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=MathTherapy><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=406859\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "Suppose a car drives on the freeway for 7 hours. In the first 3 hours, he travels at a constant<BR>\n" );
document.write( "speed. For the remaining part of the trip, he travels 10 mph faster than during the rst part<BR>\n" );
document.write( "of the drive. If he travelled 500 miles, how fast was he going during the rst part of the drive?\r<BR>\n" );
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document.write( "I just cant seem to come up with an equation, I need it explained. Any help would work thanks!\r<BR>\n" );
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document.write( "Let speed during 1st part of trip be S<BR>\n" );
document.write( "Then speed during last part of trip = S + 10\r<BR>\n" );
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document.write( "Distance covered during 1st part of trip, plus distance covered in last part of trip = total distance traveled, OR\r<BR>\n" );
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document.write( "3S + 4(S + 10) = 500\r<BR>\n" );
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document.write( "3S + 4S + 40 = 500\r<BR>\n" );
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document.write( "7S = 500 - 40\r<BR>\n" );
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document.write( "7S = 460\r<BR>\n" );
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document.write( "S, or speed during 1st part of trip = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=460%2F7 ALIGN=MIDDLE  ALT=\"460%2F7\"   DISABLED_style= \"max-width:90%; height:auto;\" >, or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%2865%265%2F7%29 ALIGN=MIDDLE  ALT=\"highlight_green%2865%265%2F7%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > mph\r<BR>\n" );
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document.write( "Send comments and “thank-yous” to “D” at MathMadEzy@aol.com  </SPAN>\n" );
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