Answer
The determinant is $\frac{4}{21} $
Work Step by Step
The determinant is
$\frac{5}{7}\times \frac{2}{3} - \frac{1}{3}\times\frac{6}{7}=\frac{10}{21}-\frac{6}{21}=\frac{4}{21} $
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Appendix E - Exercise Set - Page 1004: 8
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