Question 110746
{{{12x + 20y <= 800}}}
{{{20y <= -12x + 800}}}
{{{y <= -(3/5)x + 40}}} answer
{{{x + y <= 50}}}
{{{y <= -x + 50}}} answer
{{{x >= 10}}} answer
{{{y >= 15}}} answer
{{{ graph( 500, 500, -10, 100, -10, 60, -(3/5)x+40,-x+50,15) }}}
The operating area is below BOTH lines, above the horizontal line {{{y >=15}}},
and to the right of the vertical {{{x >= 10}}} which I don't
know how to plot, but imagine it's there