document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=996312>Question 996312</A>: <I><SPAN STYLE=\"word-break: break-all;\"> You need a new cell phone for emergencies only company a charges $12 per month plus $0.10 per minute while Company B charges $0.15 per minute with no monthly service charge for how many minutes will the monthly cost to be the same </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #614810 by </B><A HREF=/tutors/aboutme.mpl?userid=addingup><B>addingup(3677)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=addingup><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=addingup><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=614810\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let's call the minutes x:<BR>\n" );
document.write( "Company A:<BR>\n" );
document.write( "12+0.10x<BR>\n" );
document.write( "Company B:<BR>\n" );
document.write( "0.15x When will costs be the same? When A=B:<BR>\n" );
document.write( "12+0.10x=0.15x Now subtract 0.10x from both sides:<BR>\n" );
document.write( "12= 0.05x<BR>\n" );
document.write( "Divide both sides by 0.05:<BR>\n" );
document.write( "x=240 At 240 minutes both will cost you the same. <BR>\n" );
document.write( "--------------------------<BR>\n" );
document.write( "Now, every minute OVER 240 will cost you 0.10 with A and 0.15 with B, therefore if you are going to use more than 240 minutes choose A.<BR>\n" );
document.write( "On the other hand, if you are going to use LESS than 240 minutes... what happens? Let's pretend you will use 200 minutes:<BR>\n" );
document.write( "A)12+0.10(200)= 32<BR>\n" );
document.write( "B)0.15(200)= 30<BR>\n" );
document.write( "So, as you can see, if you use less than 240 minutes B is cheaper.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      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