the width of the rectangle is 5 inches less than it's length, and the area is 84 square inches. what are the length and width of
1 answer:
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The matrix is not properly formatted.
However, I'm able to rearrange the question as:
Operations:
Please note that the above may not reflect the original question. However, you should be able to implement my steps in your question.
Answer:
Step-by-step explanation:
The first operation:
This means that the new second row (R2) is derived by:
Multiplying the first row (R1) by 2; add this to the second row
The row 1 elements are:
Multiply by 2
Add to row 2 elements are:
The second operation:
This means that the new third row (R3) is derived by:
Multiplying the first row (R1) by -3; add this to the third row
The row 1 elements are:
Multiply by -3
Add to row 2 elements are:
Hence, the new matrix is: