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motikmotik
3 years ago
12

20% of the dogs at the pound needed medical care. what is the ratio of dogs that needed care and dogs that did not

Mathematics
1 answer:
Aleksandr-060686 [28]3 years ago
7 0
I believe it is 1 : 5. Hope this helps :)
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If A is nonsingular, then (AT )-1 =(A-1) T . (a) Verify this theorem for 2 × 2 matrices
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Answer:

Verified

Step-by-step explanation:

Let the 2x2 matrix A be in the form of:

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Then the transposed version of A is

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Then the inverted version of transposed A is

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The inverted version of A is:

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The transposed version of inverted A is:

(A^{-1})^T = \frac{1}{ad - bc}\left[\begin{array}{cc}a&-c\\-b&d\end{array}\right]

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..................
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