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vampirchik [111]
3 years ago
5

YOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO

Mathematics
1 answer:
Molodets [167]3 years ago
4 0
Hi yes yowww eeeeeeeee
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What is the inverse matrix that can be used to solve this systems of equations
Gala2k [10]

Step-by-step explanation:

The answer is OPTION C

Find the Inverse of a 3x3 Matrix.

First

Find the Determinant of A(The coefficients of e

Proceed towards finding the CO FACTOR of the 3x3 Matrix.

+. - +

A= [ 1 -1 -1 ]

[ -1 2 3 ]

[ 1 1 4 ]

The determinant of this is 1.

Find the co factor

| 2 3 | |-1 3 | |-1 2 |

| 1. 4. | |1 4 | |1. 1 |

|-1. -1 | |1 -1 | |1 -1

| 1. 4 | |1. 4| |1 1|

|-1. -1 | |1 -1 | |1. -1

|2. 3| |-1. 3| |-1 2|

After Evaluating The Determinant of each 2x 2 Matrix

You'll have

[ 5 7 -3]

[3 5 -2 ]

[-1 -2 1]

Reflect this along the diagonal( Keep 5,5 -2)

Then switching positions of other value

No need of Multiplying by the determinant because its value is 1 from calculation.

After this

Our Inverse Matrix Would be

[ 5 3 -1 ]

[7 5 -2 ]

[ -3 -2 1]

THIS IS OUR INVERSE.

SO

OPTION C

5 0
2 years ago
I need to put the words in place
marusya05 [52]
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8 0
3 years ago
What is the surface area of a cone with a radius of 15 and a height of 8
Rasek [7]

formula is pi*r*(r+sqaureroot(h^2+r^2)


 plug in the numbers and the calculated area is 1507.96

 but since you cant use fraction or decimals

 the answer should be 480PI

8 0
3 years ago
The clothing club sold 40 pants and shirts at a new store and made $700 from the sales. They charged $18 for each pants and $14
hoa [83]

Answer: The system of equations represents the constraints in this situation are:

s + h = 40

$18s + $14h = $700

The above equations are known as simultaneous equations. 40 scarves and hats were sold, this can be represented with this equation:

number of hats sold + number of scarves sold = 40

s + h = 40

The total amount made from the sales is the sum of the total amount made from the sale of the hats and the total amount made from the sale of the scarves. This can be represented with this equation:

($18 x s) + ($14 x h)  = $700

Step-by-step explanation:

3 0
2 years ago
-l-7+3l evaluate negative absolute value of negative 7 plus 3
kicyunya [14]
-l-7+3l =  -|-4| = -4

Answer: 
-4
7 0
3 years ago
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