College Algebra (10th Edition)

Published by Pearson
ISBN 10: 0321979478
ISBN 13: 978-0-32197-947-6

Chapter 8 - Section 8.4 - Matrix Algebra - 8.4 Assess Your Understanding - Page 599: 70

Answer

$A^{-1}=\left[\begin{array}{rrrr} {0.01}&{0.04}&{0.00}&{0.03}\\ {0.02}&{-0.02}&{0.01}&{0.01}\\ {-0.04}&{0.02}&{0.04}&{0.06}\\ {0.05}&{-0.02}&{0.00}&{-0.09}\end{array}\right]$

Work Step by Step

Using desmos.com/matrix select "New matrix", define the dimensions, and enter the matrix entries... (see screenshot) Rounding to two decimal places, $A^{-1}=\left[\begin{array}{rrrr} {0.01}&{0.04}&{0.00}&{0.03}\\ {0.02}&{-0.02}&{0.01}&{0.01}\\ {-0.04}&{0.02}&{0.04}&{0.06}\\ {0.05}&{-0.02}&{0.00}&{-0.09}\end{array}\right]$
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