document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=390348>Question 390348</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The word problem is:<BR>\n" );
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document.write( "Boats A and B leave the same point at the same time at right angles. B travels 7 km/h slower than A. After 4 hours they are 68 km apart. Find the speed of each boat.\r<BR>\n" );
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document.write( "That is exactly how it is written in the book and I can't figure it out. Can you please help me? If so thank you. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #276865 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=276865\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Boats A and B leave the same point at the same time at right angles.<BR>\n" );
document.write( " B travels 7 km/h slower than A. After 4 hours they are 68 km apart. Find the speed of each boat. <BR>\n" );
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document.write( "Let x = boat A's speed<BR>\n" );
document.write( "then<BR>\n" );
document.write( "(x-7) = boat B's speed<BR>\n" );
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document.write( "Dist = speed times time<BR>\n" );
document.write( "A's dist: 4x<BR>\n" );
document.write( "B's dist: 4(x-7) = (4x-28)<BR>\n" );
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document.write( "(4x)^2 + (4x-28)^2 = 68^2<BR>\n" );
document.write( "16x^2 + 16x^2 - 224x + 784 = 4624<BR>\n" );
document.write( "32x^2 - 224x - 3840 = 0<BR>\n" );
document.write( "Simplify, divide by 32<BR>\n" );
document.write( "x^2 - 7x - 120 = 0<BR>\n" );
document.write( "Factors to<BR>\n" );
document.write( "(x-15(x+9)<BR>\n" );
document.write( "positive solution<BR>\n" );
document.write( "x = 15 is boat A's speed<BR>\n" );
document.write( "you can find boat b's speed </SPAN>\n" );
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