document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=148366>Question 148366</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a disc jockey must play 14 commercial spots during 1 hour of a radio show.  Each commercial is either 30 seconds or 60 seconds long.  If the total commercial time during 1 hour is 11 minutes how many 30 second commercials were played that hour?  How many 60 second commercials? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #108743 by </B><A HREF=/tutors/aboutme.mpl?userid=mangopeeler07><B>mangopeeler07(462)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mangopeeler07><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=108743\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a disc jockey must play 14 commercial spots during 1 hour of a radio show.  Each commercial is either 30 seconds or 60 seconds long.  If the total commercial time during 1 hour is 11 minutes how many 30 second commercials were played that hour?  How many 60 second commercials?\r<BR>\n" );
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document.write( "the total commercial time during 1 hour is 11 minutes<BR>\n" );
document.write( "Convert 11 minutes to seconds<BR>\n" );
document.write( "660 seconds\r<BR>\n" );
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document.write( "x=amount of 30 second commercials<BR>\n" );
document.write( "y=amount of 60 second commercials\r<BR>\n" );
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document.write( "30x+60y=660\r<BR>\n" );
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document.write( "a disc jockey must play 14 commercials\r<BR>\n" );
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document.write( "x+y=14\r<BR>\n" );
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document.write( "So you have \r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=30x%2B60y=660 ALIGN=MIDDLE  ALT=\"30x%2B60y=660\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2By=14 ALIGN=MIDDLE  ALT=\"x%2By=14\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Use the second equation and solve for x.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2By=14 ALIGN=MIDDLE  ALT=\"x%2By=14\"   DISABLED_style= \"max-width:90%; height:auto;\" > becomes <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=14-y ALIGN=MIDDLE  ALT=\"x=14-y\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Plug that in for x in the first equation.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=30%2814-y%29%2B60y=660 ALIGN=MIDDLE  ALT=\"30%2814-y%29%2B60y=660\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Distribute<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=420-30y%2B60y=660 ALIGN=MIDDLE  ALT=\"420-30y%2B60y=660\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Combine like terms<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=420%2B30y=660 ALIGN=MIDDLE  ALT=\"420%2B30y=660\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Subtract 420 from both sides<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=30y=240 ALIGN=MIDDLE  ALT=\"30y=240\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Divide by 30<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=8 ALIGN=MIDDLE  ALT=\"y=8\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "plug that in for y in the second original equation<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2B8=14 ALIGN=MIDDLE  ALT=\"x%2B8=14\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=6 ALIGN=MIDDLE  ALT=\"x=6\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Check: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=30x%2B60y=660 ALIGN=MIDDLE  ALT=\"30x%2B60y=660\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=30%286%29%2B60%288%29=660 ALIGN=MIDDLE  ALT=\"30%286%29%2B60%288%29=660\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=180%2B480=660 ALIGN=MIDDLE  ALT=\"180%2B480=660\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "It's true!\r<BR>\n" );
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document.write( "So the dj played 6 thirty-second commercials and 8 sixty-second commercials </SPAN>\n" );
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