Question 388489
*[invoke plot_any_inequality "y<=0", -10, 10, -10, 10, 300, 300]
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*[invoke plot_any_inequality "x<=0", -10, 10, -10, 10, 300, 300]

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*[invoke plot_any_inequality "x>=y", -10, 10, -10, 10, 300, 300]
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*[invoke plot_any_inequality "x+y>=-4", -10, 10, -10, 10, 300, 300]
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Putting all of the constraints together shows the triangular area marked by the circles below. 

{{{drawing(300,300,-5,2,-5,2,grid(1),circle(0,0,0.2),circle(-2,-2,0.2),circle(0,-4,0.2),graph(300,300,-5,2,-5,2,0,x,-4-x))}}}