Use the two steps for solving a linear programming problem to solve the problem.A breed of cattle needs at least 10 protein and 8 fat units per day. Feed type I provides 6 protein and 2 fat units at $4 per bag. Feed type II provides 2 protein and 3 fat units at $3 per bag. What mixture of Feed type I and Feed type II will fill the dietary needs at minimum cost? Let x represent the number of bags of Feed type I and y represent the number of bags of Feed type II.
A. 4 bags Feed type I and 0 bags Feed type II
B. 1 bag Feed type I and 2 bags Feed type II
C. 0 bags Feed type I and 5 bags Feed type II
D. 1 bag Feed type I and 1 bag Feed type II
Answer: B
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A. 5 - i , 5 + 
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C. -5i, -5 + 
D. 5 - i , -5 + 
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?
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. An airplane is flying parallel to and 1 miles east of the north axis. (In other words, the plane is flying along the path 
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answer to the nearest tenth of a mile. A. 5.1 miles B. 12 miles C. 11.2 miles D. 12.9 miles