document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=65379>Question 65379</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0078279992/algebrahomeworkh></A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> a trip between two towns in montana takes 4 hours under ideal conditions.  The first 150 miles of the trip is on a interstate, and the second 130 miles is on a highway with a speed limit that is 10 miles per hour less than on interstate\r<BR>\n" );
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document.write( "a)if x represents the speed limit on the interstate, write an expression that represents the time spend at that speed <BR>\n" );
document.write( "b) write an expression for the time spent on the other highway <BR>\n" );
document.write( "c)write and solve an equation to find the speed limit on the interstate and on the highway </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #45914 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley71><B>checkley71(8403)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley71><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=45914\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 150/X+130/(X-10)=4<BR>\n" );
document.write( "[150(X-10)+130X]/X(X-10)=4<BR>\n" );
document.write( "(150X-1500+130X]/(X^2-10X)=4<BR>\n" );
document.write( "280X-1500=4X^2-40X=0<BR>\n" );
document.write( "4X^2-40X-280X+1500=0<BR>\n" );
document.write( "4X^2-320X+1500=0 USING THE QUADRATIC EQUATION X=(-B+-SQRTB^2-4AC])/2A WE GET<BR>\n" );
document.write( "X=(320+-SQRT[-320*-320]-[4*4+1500])/2*4<BR>\n" );
document.write( "X=(320+-SQRT[102400-24000])/8<BR>\n" );
document.write( "X=(320+-SQRT[78400])/8<BR>\n" );
document.write( "X=(320+-280)/8<BR>\n" );
document.write( "X=(320+280)/8<BR>\n" );
document.write( "X=600/8<BR>\n" );
document.write( "X=75 MPH SOLUTION FOR THE INTERSTATE SPEED. 75-10=65 MPH FOR THE HIGHWAY.<BR>\n" );
document.write( "PROOF<BR>\n" );
document.write( "150/75+130/65=4<BR>\n" );
document.write( "2+2=4<BR>\n" );
document.write( "4=4<BR>\n" );
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document.write( "MERRY CHRISTMAS </SPAN>\n" );
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