document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=476752>Question 476752</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 1.A man drove a car at an average rate of speed of 45 miles per hour for the first 3 hours of a 7 hour car trip.If the average rate of speed for the entire trip was 53 miles per hour,what was the average rate of speed in miles per hour for the remaining part of the trip?<BR>\n" );
document.write( "(A)50<BR>\n" );
document.write( "(B)55<BR>\n" );
document.write( "(C)57<BR>\n" );
document.write( "(D)59<BR>\n" );
document.write( "(E)62<BR>\n" );
document.write( "2.What is the average of (x+y)^2 and (x-y)^2?<BR>\n" );
document.write( "(A)x+y/2<BR>\n" );
document.write( "(B)xy<BR>\n" );
document.write( "(C)x^2-y^2<BR>\n" );
document.write( "(D)xy/2<BR>\n" );
document.write( "(E)x^2+y^2<BR>\n" );
document.write( "Please help and thank you so much for giving your time to help me with these problems.I really appreciate it.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #326893 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=326893\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 1.A man drove a car at an average rate of speed of 45 miles per hour for the first 3 hours of a 7 hour car trip.<BR>\n" );
document.write( "If the average rate of speed for the entire trip was 53 miles per hour,what was the average rate of speed in miles per hour for the remaining part of the trip?<BR>\n" );
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document.write( "let s = av speed for the remaining part of the trip<BR>\n" );
document.write( "2nd dist drive time: 7 - 3 = 4hrs<BR>\n" );
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document.write( "Write a distance equation: dist = speed * time<BR>\n" );
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document.write( "1st dist + 2nd dist = total dist<BR>\n" );
document.write( "45(3) + 4s = 53(7)<BR>\n" );
document.write( "135 + 4s = 371<BR>\n" );
document.write( "4s = 371 - 135<BR>\n" );
document.write( "4s = 236<BR>\n" );
document.write( "s = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=236%2F4 ALIGN=MIDDLE  ALT=\"236%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "s = 59 mph av speed on the remaining part of the trip<BR>\n" );
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document.write( ":<BR>\n" );
document.write( "2.What is the average of (x+y)^2 and (x-y)^2?<BR>\n" );
document.write( "Av = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28%28x%2By%5E2%29+%2B+%28x-y%29%5E2%29%2F2 ALIGN=MIDDLE  ALT=\"%28%28x%2By%5E2%29+%2B+%28x-y%29%5E2%29%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( ";<BR>\n" );
document.write( "Square the two expressions<BR>\n" );
document.write( "Av = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28x%5E2+%2B+2xy+%2B+y%5E2+%2B+x%5E2+-+2xy+%2B+y%5E2%29%2F2 ALIGN=MIDDLE  ALT=\"%28x%5E2+%2B+2xy+%2B+y%5E2+%2B+x%5E2+-+2xy+%2B+y%5E2%29%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( ";<BR>\n" );
document.write( "combine like terms<BR>\n" );
document.write( "Av = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%282x%5E2+%2B+2y%5E2%29%2F2 ALIGN=MIDDLE  ALT=\"%282x%5E2+%2B+2y%5E2%29%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( ":<BR>\n" );
document.write( "cancel out 2<BR>\n" );
document.write( "Av = x^2 + y^2 </SPAN>\n" );
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