document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=180281>Question 180281</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0030358272/algebrahomeworkh>Holt  Algebra 1</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> It takes Akira 10 minutes to make a black and white drawing and 25 minutes for a color drawing. On Saturday he made a total of 9 drawings in 2 hours. Write and solve a system og equations to determine how many drawings of each type akira made.\r<BR>\n" );
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document.write( "So do you need in the equation that it takes 2.5 times more to make a color drawing? What I don't get is how to make the variables. And to slove this equation do you solve it by using elmination or by substitution? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #135111 by </B><A HREF=/tutors/aboutme.mpl?userid=Mathtut><B>Mathtut(3670)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Mathtut><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=135111\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> It takes Akira 10 minutes to make a black and white drawing and 25 minutes for a color drawing. On Saturday he made a total of 9 drawings in 2 hours. Write and solve a system og equations to determine how many drawings of each type akira made. <BR>\n" );
document.write( "So do you need in the equation that it takes 2.5 times more to make a color drawing? What I don't get is how to make the variables. And to slove this equation do you solve it by using elmination or by substitution?<BR>\n" );
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document.write( "First ask yourself what are they after. How MANY drawings of each type is made.That is your clue when it comes to varibles.<BR>\n" );
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document.write( "so let b and c be the NUMBER of black-white and color paintings made respectively<BR>\n" );
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document.write( "min. need to be converted to hours: so 10 min=1/6 hr and 25 min =5/12 hr<BR>\n" );
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document.write( "b+c=9...........eq 1<BR>\n" );
document.write( "1/6b+5/12c=2....eq 2<BR>\n" );
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document.write( "rewrite eq 1 to b=9-c and plug that value into eq 2<BR>\n" );
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document.write( "(1/6)(9-c)+(5/12)c=2<BR>\n" );
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document.write( "(9/6)-(1/6)c+(5/12)c=2<BR>\n" );
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document.write( "18-2c+5c=24.........multiplied all terms by 12 to get rid of fractions<BR>\n" );
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document.write( "3c=6<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28c=3%29 ALIGN=MIDDLE  ALT=\"highlight%28c=3%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >number of colored paintings made<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28b=9-c=9-3=6%29 ALIGN=MIDDLE  ALT=\"highlight%28b=9-c=9-3=6%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >number of black-white paintings made </SPAN>\n" );
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