document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1091607>Question 1091607</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Point M is the midpoint of AB. The coordinates of point A are (-8, 3) and the coordinates of M are (-2, 1). What are the coordinates of point B?\r<BR>\n" );
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document.write( "Thank you! I don't understand too much..): </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #706034 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=706034\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> midpoint between (x1, y1) and (x2, y2) is the average of the x s and the average of the y s<BR>\n" );
document.write( "Here, one has the midpoint, so work backward to get the other point.<BR>\n" );
document.write( "the midpoint for the x values is -2.  One value is -8, so (-8 +x2)/2=-2, the average of the two points is -2<BR>\n" );
document.write( "-2=(-8 +x2)/2<BR>\n" );
document.write( "multiply by 2 and -4=x^2-8, and x2=4.<BR>\n" );
document.write( "Do the same thing with y<BR>\n" );
document.write( "You can think of it this way.  The middle is y=1, and one side is 3.  That is two away from the middle, so the other side has to be 2 on the other side of the middle, or -1<BR>\n" );
document.write( "The coordinates of B are (4, -1).<BR>\n" );
document.write( "Check by adding the A and B points and taking the average: -8+4 divided by 2 is -4/2=-2.<BR>\n" );
document.write( "-1+3/2 is 2/2=1\r<BR>\n" );
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