document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=413798>Question 413798</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The Everton College store paid $1920 for an order of 50 calculators. The store paid $9 for each scientific calculator. The others, all graphing calculators, cost the store $58 each. How many of each type of calculator was ordered?\r<BR>\n" );
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document.write( "The store Ordered__scientific calculators and ___graphing calculators.<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #290310 by </B><A HREF=/tutors/aboutme.mpl?userid=bayners123><B>bayners123(12)</B></A><img src=\"/images/stars/stars-06.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=bayners123><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=290310\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> This effectively a set of simultaneous linear equations; if s is the number of scientific calculators and g is the number of graphing ones, you have been told that:<BR>\n" );
document.write( "1) There are 50 calculators<BR>\n" );
document.write( "--->   s + g = 50\r<BR>\n" );
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document.write( "2) The total cost was $1920<BR>\n" );
document.write( "--->   s * 9 + g * 58 = 1920\r<BR>\n" );
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document.write( "We can solve these in the normal way:\r<BR>\n" );
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document.write( " <TR><TD  ALIGN=MIDDLE>Solved by <A  rel=nofollow HREF=http://wiki.algebra.com/index.php/Tutoring_-_pluggable_solvers>pluggable</A> solver: <A  rel=nofollow HREF=linear.solver>Linear System solver (using determinant)</A></TD></TR>\n" );
document.write( "<TR><TD  ALIGN=LEFT>Solve:<BR>\n" );
document.write( "  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+system%28+%0D%0A++++1%5Cs+%2B+1%5Cg+=+50%2C%0D%0A++++9%5Cs+%2B+58%5Cg+=+1920+%29%0D%0A++ ALIGN=MIDDLE  ALT=\"+system%28+%0D%0A++++1%5Cs+%2B+1%5Cg+=+50%2C%0D%0A++++9%5Cs+%2B+58%5Cg+=+1920+%29%0D%0A++\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "  <BR>\n" );
document.write( "  Any system of equations:<BR>\n" );
document.write( "  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+system%28+%0D%0A++++a%5B11%5D%2As+%2B+a%5B12%5D%2Ag+=+b%5B1%5D%2C%0D%0A++++a%5B21%5D%2As+%2B+a%5B22%5D%2Ag+=+b%5B2%5D%29%0D%0A++ ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "  <BR>\n" );
document.write( "  has solution<BR>\n" );
document.write( "  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+system%28+%0D%0A++++s+=+%28b%5B1%5D%2Aa%5B22%5D+-+b%5B2%5D%2Aa%5B12%5D%29%2F%28a%5B11%5D%2Aa%5B22%5D-a%5B21%5D%2Aa%5B12%5D%29%2C%0D%0A++++g+=+%28a%5B11%5D%2Ab%5B2%5D+-+a%5B21%5D%2Ab%5B1%5D%29%2F%28a%5B11%5D%2Aa%5B22%5D-a%5B21%5D%2Aa%5B12%5D%29%0D%0A++++%29%0D%0A++ ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "  or<BR>\n" );
document.write( "  <BR>\n" );
document.write( "  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+system%28+%0D%0A++++++s+=+%2850%2A58+-+1920%2A1%29%2F%281%2A58-9%2A1%29+=+20%2C%0D%0A++++++g+=+%281%2A1920+-+9%2A50%29%2F%281%2A58-9%2A1%29+=+30%0D%0A++++%29%0D%0A++ ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "  <BR>\n" );
document.write( "  (s=20, g=30}<BR>\n" );
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document.write( "So the school ordered 20 scientific calculators and 30 graphical.  </SPAN>\n" );
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