document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1102979>Question 1102979</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Mr. Petrov drove from Richmond to Cleveland on business. The distance between the cities is 470 miles. He drove for h hours at an average speed of 50 miles per hour. Then he drove the remaining distance in k hours. His average speed for the k hours was 40 miles per hour. Which equation could be used to represent this situation?\r<BR>\n" );
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document.write( "A. 50h+40k=470<BR>\n" );
document.write( "B. 50h-40k=470<BR>\n" );
document.write( "C. (50+40)(h+k)=470<BR>\n" );
document.write( "D. h+k=470/(50+40) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #717686 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><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=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=717686\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> i believe your solution is going to be selection A:  50h + 40k = 470\r<BR>\n" );
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document.write( "here's why.\r<BR>\n" );
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document.write( "rate * time = distance is the formula to use.\r<BR>\n" );
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document.write( "you are told that he drove for h hours at 50 miles per hour.\r<BR>\n" );
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document.write( "let d1 be the distance traveled at that rate of speed.\r<BR>\n" );
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document.write( "you are then told that he drove the remaining distance in k hours and that his average speed for the k hours was 40 miles per hour.\r<BR>\n" );
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document.write( "let d2 be the distance traveled at that rate of speed.\r<BR>\n" );
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document.write( "rate * time = distance formula becomes:\r<BR>\n" );
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document.write( "50h = d1<BR>\n" );
document.write( "40k = d2\r<BR>\n" );
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document.write( "you know that d1 + d2 = 470\r<BR>\n" );
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document.write( "just replace d1 and d2 in this equation with their equivalent values of 50h and 40k and you get 50h + 40k = 470\r<BR>\n" );
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document.write( "that's selection A.\r<BR>\n" );
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document.write( " </SPAN>\n" );
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