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3 years ago

WORTH MANY POINTS PLUS CHANCE AT BRAINLIEST

Mathematics

2 answers:

AVprozaik [17]3 years ago

8 0

Answer:

3/7

Step-by-step explanation:

maria [59]3 years ago

3 0

Answer:

3/7

Step-by-step explanation:

add 1/2 and 5/2=3, make /7 in to fraction: 3/7

= 3/7 - 1/2 x 2/3 + 1/3

multiply

= 3/7 - 1/3 + 1/3

cancel out the 1/3s

= 3/7

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Given A-<br> 2 2<br> 1 3<br> what is A-¹?

devlian [24]

The inverse of matrix A = $\left[\begin{array}{cc}2&2&1&3\\\end{array}\right]$ is $A^{-1} = \frac{1}{4}$ $\left|\begin{array}{cc}3&-2&-1&2\\\end{array}\right|$

The given matrix is A = $\left[\begin{array}{cc}2&2&1&3\\\end{array}\right]$

The inverse of a matrix is given by

$A^{-1} = \frac{1}{|A|} adjA$ ...(1)

Now, determinant of matrix A is

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Now, adjoint A will be

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$A_{21}$ = -2

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AdjA = $\left|\begin{array}{cc}3&-2&-1&2\\\end{array}\right|$

Now, substituting the values of |A| and AdjA in equation (1), we get

$A^{-1} = \frac{1}{4}$ $\left|\begin{array}{cc}3&-2&-1&2\\\end{array}\right|$

Therefore, $A^{-1} = \frac{1}{4}$ $\left|\begin{array}{cc}3&-2&-1&2\\\end{array}\right|$

Know more about Inverse of Matrix: -brainly.com/question/12442362

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2 years ago

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nexus9112 [7]

Answer:

4 hr and 30 minutes?

Step-by-step explanation:

You didnt really specify soo. 11 12 1 2 2:30

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