Determine whether the matrix is in echelon form, reduced echelon form, or neither.
A. Reduced echelon form
B. Neither
C. Echelon form
Answer: C
Mathematics
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Use the rules for exponents to rewrite the expression and then evaluate the new expression. 
A. -14 B. -5 C. 0 D. 1
Mathematics
Use the product rule to simplify the expression. Assume that the variables can be any real number.
A. x3 B. x6 C. x4 D. 3x
Mathematics
Decide whether the composite functions, f ? g and g ? f, are equal to x.f(x) = 
, g(x) = x2
A. Yes, yes B. No, yes C. No, no D. Yes, no
Mathematics
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
Mathematics