document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=254877>Question 254877</A>: <I><SPAN STYLE=\"word-break: break-all;\">    <BR>\n" );
document.write( " (1)<BR>\n" );
document.write( " Which of the folowing functions has its vertex below the x-axis? <BR>\n" );
document.write( "f(x)= (x-7)^2<BR>\n" );
document.write( "f(x)= x^2-8<BR>\n" );
document.write( "f(x)= 2x^2<BR>\n" );
document.write( "f(x)= (x+3)^2\r<BR>\n" );
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document.write( " (2)<BR>\n" );
document.write( "Find the minimum or maximum value of f(x)=x^2-2x-6 Then state the domain and range of the function.<BR>\n" );
document.write( "Answer  \r<BR>\n" );
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document.write( "The maximum value is 1. D: {all real numbers}; R: {y | y –7}<BR>\n" );
document.write( "  <BR>\n" );
document.write( "The maximum value is 1. D: {x | x –7 }; R: {all real numbers}  <BR>\n" );
document.write( "   <BR>\n" );
document.write( "The minimum value is –7. D: {all real numbers}; R: {y | y –7}<BR>\n" );
document.write( "  <BR>\n" );
document.write( "The minimum value is –7. D: {x | x –7 }; R: {all real numbers}\r<BR>\n" );
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document.write( "    <BR>\n" );
document.write( " (3)<BR>\n" );
document.write( "A toy rocket is launched from the ground level with an initial vertical velocity of 96 ft/s. After how many seconds will the rocket hit the ground?<BR>\n" );
document.write( "Answer  <BR>\n" );
document.write( "6 seconds<BR>\n" );
document.write( "  <BR>\n" );
document.write( "0 seconds or 6 seconds<BR>\n" );
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document.write( "0 seconds<BR>\n" );
document.write( "  <BR>\n" );
document.write( "square root of 6 seconds\r<BR>\n" );
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document.write( "  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #187207 by </B><A HREF=/tutors/aboutme.mpl?userid=edjones><B>edjones(8007)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=edjones><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=edjones><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=187207\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 2)<BR>\n" );
document.write( "f(x)=a^2+bx+c<BR>\n" );
document.write( "x^2-2x-6 <BR>\n" );
document.write( "a is positive so there is a minimum.<BR>\n" );
document.write( "minimum at x=-b/2a=2/2=1<BR>\n" );
document.write( "minimum at y=1-2-6=-7<BR>\n" );
document.write( "Domain is all real numbers<BR>\n" );
document.write( "Range is [-7, infinity)<BR>\n" );
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document.write( "Ed<BR>\n" );
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