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Graphically minimize and maximize z = 7x...

Graphically minimize and maximize `z = 7x + 5y` subject to the constraints: `x+y le 50, x + 2y le 100, x -y ge 10 x, y ge 0`.

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The correct Answer is:
minimm value = 350 at (50,0) and maximum value = 700 at (100,0).
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