Use the two-stage method to solve.Find x1 ? 0 and x2 ? 0 such that x1 + x2 ? 50 x1 + x2 ? 25 2x1 + x2 ? 60and z = 3x1 + 4x2 is maximized.
A. x1 = 10, x2 = 40, z = 190
B. x1 = 25, x2 = 25, z = 175
C. x2 = 50, x1 = 0, z = 200
D. x1 = 50, x2 = 0, z = 150
Answer: C
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