document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1116908>Question 1116908</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Chris runs a barber's shop. It costs him £20 per day to cover his expenses and he  charges £4 for every hair cut. <BR>\n" );
document.write( "(a) Explain why his profit for any day is £ (4x -20) , where X is the number of haircuts in a that day .\r<BR>\n" );
document.write( "\n" );
document.write( "He hopes to make at least £50 profit per day , but does not intend to make more than £120 profit.<BR>\n" );
document.write( "(b) write down an inequality to describe this situation. <BR>\n" );
document.write( "(c) solve the inequality.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #731825 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39627)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=731825\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> -------------------------------------------------------------------------<BR>\n" );
document.write( "(a) Explain why his profit for any day is £ (4x -20) , where X is the number of haircuts in a that day .<BR>\n" );
document.write( "-----------------------------------------------------------------------\r<BR>\n" );
document.write( "\n" );
document.write( "Profit is Revenue minus Cost.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "-------------------------------------------------------------------------<BR>\n" );
document.write( "He hopes to make at least £50 profit per day , but does not intend to make more than £120 profit.<BR>\n" );
document.write( "-----------------------------------------------------------------------\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=50%3C=4x-20%3C=120 ALIGN=MIDDLE  ALT=\"50%3C=4x-20%3C=120\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=70%3C=4x%3C=140+ ALIGN=MIDDLE  ALT=\"70%3C=4x%3C=140+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=17.5%3C=x%3C=30 ALIGN=MIDDLE  ALT=\"17.5%3C=x%3C=30\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "In a simpler way, only allowing that no fraction of a haircut,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=18%3C=x%3C=30 ALIGN=MIDDLE  ALT=\"18%3C=x%3C=30\"   DISABLED_style= \"max-width:90%; height:auto;\" >. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );