Use Gaussian elimination or Gauss-Jordan elimination to solve the problem.Ellen wishes to mix candy worth $4.34 per pound with candy worth $7.22 per pound to form 22 pounds of a mixture worth $6.57 per pound. How many pounds of the more expensive candy should she use?
A. 5 lb
B. 17 lb
C. 22 lb
D. 7 lb
Answer: B
Mathematics
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