Select the region determined by the constraints. Then find the minimum value of the objective function (if possible) and where it occurs, subject to the indicated constraints.
?
Objective function:
?
z = 5x + 6y
?
Constraints:
?
x ? 0
y ? 0
x + y ? 8
3x + 5y ? 30
?
A. 
No minimum
B.
Minimum at (10, 0): 50
C.
Minimum at (8, 0): 49
D.
Minimum at (5, 3): 43
E.
Minimum at (0, 8): 48
Answer: D
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