document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1141263>Question 1141263</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Customers of a phone company can choose between two service plans for long distance calls. The first plan has a $10 monthly fee and charges an additional $0.16 for each minute of calls. The second plan has a $27 monthly fee and charges an additional $0.12 <BR>\n" );
document.write( "for each minute of calls. For how many minutes of calls will the costs of the two plans be equal? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #761763 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=761763\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+C+ ALIGN=MIDDLE  ALT=\"+C+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = the monthly cost of a plan<BR>\n" );
document.write( "Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+ ALIGN=MIDDLE  ALT=\"+t+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = the number of monthly minutes of calls<BR>\n" );
document.write( "---------------------------------------------------------<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+C+=+10+%2B+.16t+ ALIGN=MIDDLE  ALT=\"+C+=+10+%2B+.16t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+C+=+27+%2B+.12t+ ALIGN=MIDDLE  ALT=\"+C+=+27+%2B+.12t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "-----------------------------<BR>\n" );
document.write( "Make the costs of the plans equal<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+10+%2B+.16t+=+27+%2B+.12t+ ALIGN=MIDDLE  ALT=\"+10+%2B+.16t+=+27+%2B+.12t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+.04t+=+17+ ALIGN=MIDDLE  ALT=\"+.04t+=+17+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+425+ ALIGN=MIDDLE  ALT=\"+t+=+425+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "For 425 min of calls the two plans will be equal<BR>\n" );
document.write( "---------------------<BR>\n" );
document.write( "Check:<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+C+=+10+%2B+.16%2A425+ ALIGN=MIDDLE  ALT=\"+C+=+10+%2B+.16%2A425+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+C+=+10+%2B+68+ ALIGN=MIDDLE  ALT=\"+C+=+10+%2B+68+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+C+=+78+ ALIGN=MIDDLE  ALT=\"+C+=+78+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "and<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+C+=+27+%2B+.12%2A425+ ALIGN=MIDDLE  ALT=\"+C+=+27+%2B+.12%2A425+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+C+=+27+%2B+51+ ALIGN=MIDDLE  ALT=\"+C+=+27+%2B+51+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+C+=+78+ ALIGN=MIDDLE  ALT=\"+C+=+78+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "OK<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );