Understanding Augmented Matrices and Solutions

This video tutorial explains how to determine the solution to a system of equations using augmented matrices in reduced row echelon form. It provides two examples: one with variables x, y, z, and another with variables b, d, m. The tutorial guides viewers through identifying coefficients and constants in the matrix, interpreting each row as an equation, and solving for each variable. The video concludes with a summary of the solutions found.

What is the typical assumption for the order of variables in an augmented matrix if not specified?

• Reverse alphabetical order

• Random order

• Numerical order

• Alphabetical order

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CCSS.HSA.REI.C.9

In the first example, what does the first row of the matrix tell us about the variable x?

• x equals 1

• x equals 0

• x equals -1

• x equals 6

What is the value of y in the first example?

• y equals 0

• y equals 1

• y equals -1

• y equals 6

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CCSS.7.EE.B.4A

What is the final solution for z in the first example?

• z equals 1

• z equals 0

• z equals 6

• z equals -1

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CCSS.HSA.REI.C.8

In the second example, which column contains the coefficients for the variable b?

• Column one

• Column three

• Column four

• Column two

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CCSS.HSA.CED.A.3

How is the clarity of variable placement in columns different in the second example compared to the first?

• No clarity in either example

• The same clarity in both examples

• More clear in the second example

• Less clear in the second example

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CCSS.8.EE.C.7B

What is the value of b in the second example?

• b equals -4

• b equals 4

• b equals -3

• b equals 3

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CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

In the second example, what does the second row of the matrix tell us about the variable d?

• d equals 0

• d equals -3

• d equals -4

• d equals 3

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CCSS.7.EE.B.4A

What is the final solution for m in the second example?

• m equals 0

• m equals -3

• m equals -2

• m equals 2

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CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What is the main purpose of using reduced row echelon form in solving systems of equations?

• To remove constants

• To make the matrix larger

• To add more variables

• To simplify the matrix for easier solution finding

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CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6