document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=991290>Question 991290</A>: <I><SPAN STYLE=\"word-break: break-all;\"> use proportions to solve\r<BR>\n" );
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document.write( "a transformer reduces or increases the voltage (V) of an alternating current based on the ratio of the coils in the input circuit (N in) to the coils in the output circuit (N out) according to the following proportion: V out/ V in = N out/ N in. A transformer is used to reduce the 120V household current to the 18V used in model train sets. If the transformer has 180 coils on the input circuit, how many coils are on the output circuit? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #611169 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(52786)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ikleyn><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=ikleyn><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=611169\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .<BR>\n" );
document.write( "V_in= 120V, V_out = 18V, N_in = 180 coils, N_out = x coils.\r<BR>\n" );
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document.write( "A proportion:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=18%2F120 ALIGN=MIDDLE  ALT=\"18%2F120\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2F180 ALIGN=MIDDLE  ALT=\"x%2F180\"   DISABLED_style= \"max-width:90%; height:auto;\" >,\r<BR>\n" );
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document.write( "The solution:\r<BR>\n" );
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document.write( "x = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%2818%2A180%29%2F120 ALIGN=MIDDLE  ALT=\"%2818%2A180%29%2F120\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%2818%2A3%29%2F2 ALIGN=MIDDLE  ALT=\"%2818%2A3%29%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 9*3 = 27 coils.\r<BR>\n" );
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document.write( " </SPAN>\n" );
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