Jambmaths question:
The solution set of the shaded area is
Option A:
$y+x\ge 4,y\le x$
Option B:
$y\le x,y+x\le 4\text{ and }y\ge 0$
Option C:
$y\ge 0,y\ge x\text{ and }y+x\le 4$
Option D:
$y\le x,y+x\le 4$
Jamb Maths Solution:
Option C
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