document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=264554>Question 264554</A>: <I><SPAN STYLE=\"word-break: break-all;\"> the line y=0 is a tangent to the circle (x-8)^2 + (y-a)^2=16. find the value of a. thank you so much!! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #194756 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=194756\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> the line y=0 is a tangent to the circle (x-8)^2 + (y-a)^2=16. find the value of a.<BR>\n" );
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document.write( "y=0 is the x-axis.<BR>\n" );
document.write( "The radius of the circle is 4 (the square root of 16).<BR>\n" );
document.write( "The center has to be 4 units from the x-axis, so<BR>\n" );
document.write( "a = 4 or<BR>\n" );
document.write( "a = -4<BR>\n" );
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