Chapter 2 Homework Solutions (2.1 - 2.5)

Contains worked-out solutions to all homework problems assigned in
Chapter 2, including:

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2.1 Row Echelon Form And Rank, 1---3
2.2 The Reduced Row Echelon Form, 1---3
2.3 Consistency Of Linear Systems, 1---3, 5, 7
2.4 Homogeneous Systems, 1, 2, 4, 5, 6
2.5 Nonhomogeneous Systems, 1---4
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*NOTE*
Answers to some problems may be cut-off due to scanning issues
Revert "Chapter 2 Homework Solutions (2.1 - 2.5)"

This reverts commit d7a6cbf2d72a2311f1ad3002d00f48b0d2d70238.
Chapter 7.2

Solutions to assigned problems in Chapter 7.2.
trying to fix merge issue
Merge branch 'master' of https://github.com/NCSU-Analytics/Linear_Algebra