document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=106081>Question 106081</A>: <I><SPAN STYLE=\"word-break: break-all;\"> My problem says that I am trying to find a phone company who is cheaper. Company Static will charge me $170 per month and company Ringer will charge me $89 per month plus $0.18 per minute. The question is telling me to make a graph showing when the two companies will cost the same amount. I know that to find where they equal the same amount I should set them equal to one another, I just do not know what to do after that. Please help!<BR>\n" );
document.write( "Static= 170 per month <BR>\n" );
document.write( "Ringer= 89+0.18 per month  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #77181 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=77181\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> My problem says that I am trying to find a phone company who is cheaper. Company Static will charge me $170 per month and company Ringer will charge me $89 per month plus $0.18 per minute. The question is telling me to make a graph showing when the two companies will cost the same amount. I know that to find where they equal the same amount I should set them equal to one another, I just do not know what to do after that. Please help!<BR>\n" );
document.write( "Static= 170 per month <BR>\n" );
document.write( "Ringer= 89+0.18 per month <BR>\n" );
document.write( "----------<BR>\n" );
document.write( "Let \"x\" be the number of minutes you use in a month.<BR>\n" );
document.write( "------------------<BR>\n" );
document.write( "Plan A: A(x)= 170<BR>\n" );
document.write( "Plan B: B(x) = 89 + 0.18x <BR>\n" );
document.write( "--------------------<BR>\n" );
document.write( "Graph y = 170 as a horizontal line<BR>\n" );
document.write( "Graph y = 89+0.18x <BR>\n" );
document.write( "---------------------<BR>\n" );
document.write( "Find the point of intersection or solve the following equation <BR>\n" );
document.write( "89 + 0.18x = 170<BR>\n" );
document.write( "0.18x = 81<BR>\n" );
document.write( "x = 450 (this is the number of minutes when the two costs are equal)<BR>\n" );
document.write( "---------------------<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=graph%28400%2C300%2C-10%2C470%2C-10%2C200%2C170%2C89%2B0.18x%29 ALIGN=MIDDLE  ALT=\"graph%28400%2C300%2C-10%2C470%2C-10%2C200%2C170%2C89%2B0.18x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "-----------<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );