document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=458793>Question 458793</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Explain what the domain and range are of a function.  Find the domain of your selected function while showing your work, and explain the process.<BR>\n" );
document.write( "15.) f(x)=2x+1<BR>\n" );
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document.write( "Week 7 DQ #1<BR>\n" );
document.write( "	Show how to solve it using the substitution method, and explain this process.<BR>\n" );
document.write( "Additionally, how do you know what the solution is when graphing a system of equations?\r<BR>\n" );
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document.write( "7.)<BR>\n" );
document.write( "9x-2y= - 6<BR>\n" );
document.write( "7x+8=y\r<BR>\n" );
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document.write( "Week 7 DQ #2<BR>\n" );
document.write( "Show how to solve it using the elimination method, and explain this process.<BR>\n" );
document.write( "1.)	<BR>\n" );
document.write( "Y=5 - 4X<BR>\n" );
document.write( "       2X-3Y=13<BR>\n" );
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document.write( "Thanks Thanks! Practice work! Very Lost!  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #315501 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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=315501\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Explain what the domain and range are of a function. Find the domain of your selected function while showing your work, and explain the process.<BR>\n" );
document.write( "15.) f(x)=2x+1<BR>\n" );
document.write( "Solution:<BR>\n" );
document.write( "When you don't see any denominators or sqrt in the function, the domain and range are all real numbers, that is, (-&#8734;,&#8734;)\r<BR>\n" );
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document.write( "Week 7 DQ #1<BR>\n" );
document.write( "Show how to solve it using the substitution method, and explain this process.<BR>\n" );
document.write( "Additionally, how do you know what the solution is when graphing a system of equations? <BR>\n" );
document.write( "7.)<BR>\n" );
document.write( "9x-2y= - 6<BR>\n" );
document.write( "7x+8=y<BR>\n" );
document.write( "solution:<BR>\n" );
document.write( "sub y=7x+8 into first equation<BR>\n" );
document.write( "9x-2(7x+8)=-6<BR>\n" );
document.write( "9x-14x-16=-6<BR>\n" );
document.write( "-5x=10<BR>\n" );
document.write( "x=-2<BR>\n" );
document.write( "y=7x+8=7(-2)+8=-6<BR>\n" );
document.write( "point of intersection:(-2,-6)<BR>\n" );
document.write( "When graphing, if the lines cross, there is only one solution at the (x,y) coordinates of (-2,-6)<BR>\n" );
document.write( "There is no solution if the lines do not cross.<BR>\n" );
document.write( "..<BR>\n" );
document.write( "Week 7 DQ #2<BR>\n" );
document.write( "Show how to solve it using the elimination method, and explain this process.<BR>\n" );
document.write( "1.)	<BR>\n" );
document.write( "Y=5 - 4X<BR>\n" );
document.write( "2X-3Y=13<BR>\n" );
document.write( "..<BR>\n" );
document.write( "solution:<BR>\n" );
document.write( "rewrite first equation<BR>\n" );
document.write( "4x+y=5<BR>\n" );
document.write( "2x-3y=13<BR>\n" );
document.write( "multiply first equation by 3<BR>\n" );
document.write( "12x+3y=15<BR>\n" );
document.write( "2x-3y=13<BR>\n" );
document.write( "add equations<BR>\n" );
document.write( "14x=28<BR>\n" );
document.write( "x=28/14=2<BR>\n" );
document.write( "y=5-4x=5-8=-3 </SPAN>\n" );
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