document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=781321>Question 781321</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I'm having trouble finding f(30). We had an assignment to make figures out of q-tips: # of q-tips & the # of q-tips around the perimeter. We had to plot that, which I did. I did a few questions & came across that one (f(30)) & I'm greatly confused. The question says \"Find the value of f(30). What does it represent? How would I find this...? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #475848 by </B><A HREF=/tutors/aboutme.mpl?userid=DrBeeee><B>DrBeeee(684)</B></A><img src=\"/images/stars/stars-11.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=DrBeeee><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=475848\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> You need to know the function f(). For example let<BR>\n" );
document.write( "(1) f(x) = x^2 + 3x -4<BR>\n" );
document.write( "Then to find f(30), all you do is substitute 30 for every x in the function.<BR>\n" );
document.write( "(2) f(30) = 30^2 + 3*30 -4 or<BR>\n" );
document.write( "(3) f(30) = 900 + 90 -4 or<BR>\n" );
document.write( "(4) f(30) = 986<BR>\n" );
document.write( "Does this help? I hope so.\r<BR>\n" );
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