Answer
The student added the individual row elements of each matrix together.
Work Step by Step
This doesn't work since the matrices are not the same. The second matrix should be a 2x2 matrix (instead of a 1x1 matrix).
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 11 - Data Analysis and Probability - 12-1 Organizing Data Using Matrices - Lesson Check - Page 717: 6
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