document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=362839>Question 362839</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Kim averaged 52mph on state highways and 62mph on interstate highways on a 450-mile trip.  if her driving time was 7 hours-45 minutes, how many hours did she spend on state highways?  assume that the entire 7 hours-45 minutes was spent on either state or interstate highways, and round your answer to the nearest tenth of an hour </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #258641 by </B><A HREF=/tutors/aboutme.mpl?userid=robertb><B>robertb(5830)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=robertb><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=robertb><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=258641\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let s = # hours on state h-way, i = # hours on interstate h-way.  Then <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=matrix%282%2C1%2Cs%2Bi+=+31%2F4%2C52s%2B62i+=+450%29 ALIGN=MIDDLE  ALT=\"matrix%282%2C1%2Cs%2Bi+=+31%2F4%2C52s%2B62i+=+450%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.<BR>\n" );
document.write( "From the top equation, s = 7.75 - i.  Sustitute into the bottom equation, <BR>\n" );
document.write( "we get<BR>\n" );
document.write( "52(7.75-i)+62i = 450,<BR>\n" );
document.write( "403 -52i+62i = 450,<BR>\n" );
document.write( "10i = 47,<BR>\n" );
document.write( "i = 4.7, and s = 7.75 - 4.7 = 3.05.<BR>\n" );
document.write( "Therefore kim spent 4.7 hours in interstate h-way, and 3.05 hours in state h-ways. </SPAN>\n" );
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