MATH 1630 Internet
Spring 2009 Quiz 4 Name:
You must show all work to receive full credit. Round all decimal answers to the nearest hundredth.
This quiz includes material from sections 3.3, 4.1, and 4.2.
1. (6 points) The following matrix represents a system of linear equations. Solve this system of equations by
staying entirely in matrix form and showing all work. There should be no x’s or y’s on your paper until the
final answer.
476
347
⎡⎤
⎢⎥
⎣⎦
2. (6 points) The following matrix represents a system of linear equations. Use the Gauss-Jordan Elimination
Method to solve this system of equations. Stay entirely in matrix form and show all work. There should be no
x’s or y’s on your paper until the final answer.
12 310
2148
33 114
⎡⎤
⎢⎥
−
⎢⎥
⎢⎥
−
⎣⎦
