Solve using matrices.Tim and Judy mix two kinds of feed for pedigreed dogs. They wish to make 19 pounds of feed worth $0.39 per pound by mixing one kind worth $0.12 per pound with another worth $0.52 per pound. How many pounds of the cheaper kind should they use in the mix?
A. 8 pounds
B. 18 pounds
C. 13 pounds
D. 6 pounds
Answer: D
Mathematics
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A. - 
B. 
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