document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=378073>Question 378073</A>: <I><SPAN STYLE=\"word-break: break-all;\"> i actually have 3 questions.<BR>\n" );
document.write( "1. henry wants to join a book of the month club. the first club cost $40 to join and $10 per book. The second club cost $15 per book and has no fee to join. how many books need to be purchased from each club for the clubs to cost the same? \r<BR>\n" );
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document.write( "they need to be in an equation.\r<BR>\n" );
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document.write( "2. A car's speed before a sudden stop can be estimated by the formula S=30gk, where S=speed of the car in mph, g= drag fact,k=length of skid mark. the drag factor during a recent crash was 0.8. What was the approximate speed of the car if it created skid marks 193 feet long?\r<BR>\n" );
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document.write( "3. A group of 3 children and 2 adults pay a total of $120 to take a karate class. A group of 5 children and 1 adult take the same karate class for $95. What is the total cost for 1 child and 1 adult to take the karate class? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #268637 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=268637\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I can answer (3)<BR>\n" );
document.write( "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;\" > = cost for 1 child<BR>\n" );
document.write( "Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a ALIGN=MIDDLE  ALT=\"a\"   DISABLED_style= \"max-width:90%; height:auto;\" > = cost for 1 adult<BR>\n" );
document.write( "given:<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3c+%2B+2a+=+120 ALIGN=MIDDLE  ALT=\"3c+%2B+2a+=+120\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5c+%2B+a+=+95 ALIGN=MIDDLE  ALT=\"5c+%2B+a+=+95\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Multiply both sides of (2) by <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2 ALIGN=MIDDLE  ALT=\"2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "and subtract (1) from (2)<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=10c+%2B+2a+=+190 ALIGN=MIDDLE  ALT=\"10c+%2B+2a+=+190\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-3c+-+2a+=+-120 ALIGN=MIDDLE  ALT=\"-3c+-+2a+=+-120\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=7c+=+70 ALIGN=MIDDLE  ALT=\"7c+=+70\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=c+=+10 ALIGN=MIDDLE  ALT=\"c+=+10\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "And, from (2),<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5%2A10+%2B+a+=+95 ALIGN=MIDDLE  ALT=\"5%2A10+%2B+a+=+95\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a+=+95+-+50 ALIGN=MIDDLE  ALT=\"a+=+95+-+50\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a+=+45 ALIGN=MIDDLE  ALT=\"a+=+45\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "$10 = cost for 1 child<BR>\n" );
document.write( "$45 = cost for 1 adult\r<BR>\n" );
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document.write( " </SPAN>\n" );
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