Provide an appropriate response.Suppose that you are solving a system of three linear equations and have evaluated D, Dx, Dy, and Dz. Under what condition does Cramer's rule not apply?
A. Dx = 0
B. D = 0; and either Dx = 0, Dy = 0, or Dz = 0
C. Dx = 0, Dy = 0, or Dz = 0
D. D = 0
Answer: D
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Write the partial fraction decomposition of the improper rational expression.
A. 
B. 
C. ?
D. 
E. 