#### Answer

a. True.
b. False.
c. False.
d. True.

#### Work Step by Step

a. The first box on page 7 states that row equivalent augmented matrices always have the same solution set, and the definition of row equivalence on page 6 states that matrices are row equivalent if they may be transformed into one another by a sequence of elementary row operations.
b. At the bottom of page 6, the text states that two matrices are row equivalent if they may be transformed into one another by a sequence of elementary row operations.
c. Below the box on page 4, the text states that an inconsistent system has no solutions.
d. This is a direct quote from page 3.