document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=298972>Question 298972</A>: <I><SPAN STYLE=\"word-break: break-all;\"> What is Amy's speed if she travels 450 miles at a certain speed. If the car had gone 15mph faster, the trip would have taken 1 hour less? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #214967 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=214967\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> let her speed be x\r<BR>\n" );
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document.write( "she traveled 450 miles\r<BR>\n" );
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document.write( "time taken by her = 450/x\r<BR>\n" );
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document.write( "if her speed was x-15 it would have taken 450 /x + 15\r<BR>\n" );
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document.write( "450/x - 450 / x+15 = 1\r<BR>\n" );
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document.write( "450(x+15)-450x  / x(x+15)=1\r<BR>\n" );
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document.write( "450x +6750-450x =x^2 +15x\r<BR>\n" );
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document.write( "x^2+15x-6750=0\r<BR>\n" );
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document.write( "x^2+90x-75x-6750=0\r<BR>\n" );
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document.write( "x(x+90)-75(x+90)=0\r<BR>\n" );
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document.write( "(x-75)(x+90)=0\r<BR>\n" );
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document.write( "x=75 a positive value which is her speed\r<BR>\n" );
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document.write( " </SPAN>\n" );
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