document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=82678>Question 82678</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hi, could you please check my answer for this question.  If it is wrong, could you explain to me how you got the right answer.  Thank you so much!\r<BR>\n" );
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document.write( "Find the domain of f(x)= 7 + squared 3x + 21, and express it using interval notation.\r<BR>\n" );
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document.write( "The answer I received is [-7, 00 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #59283 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=59283\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Find the domain of f(x)= 7 + sqrt(3x + 21), and express it using interval notation.\r<BR>\n" );
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document.write( "The radicand, 3x+21, cannot negative.<BR>\n" );
document.write( "So, you have to determine when it is not negative:<BR>\n" );
document.write( "3x+21>=0<BR>\n" );
document.write( "3x>=-21<BR>\n" );
document.write( "x>=-7<BR>\n" );
document.write( "Answer in interval notation: [-7,inf)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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