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Effectus [21]
2 years ago
7

Construa a matriz B=(bij)2×4 definida por Bij= 1, se i=j i+j, se i≠j​

Mathematics
1 answer:
Alexandra [31]2 years ago
4 0

Answer:

\left[\begin{array}{cccc}1&3&4&5\&3&1&5&6\end{array}\right]

The only ones are on the "diagonal", where i = j. Else the position is simply the sum.

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Can someone help me with this<br> 2x+4y+3z=6<br> x-2y+z=-5<br> -x-3y-2z=-7<br> solve for x,y,z
Flauer [41]

Answer:

x = -7 2/3, y = 1 1/3 and z = 5 1/3.

Step-by-step explanation:

2x+4y+3z=6    .....  1

x-2y+z=-5        ...... 2

-x-3y-2z=-7      .......3

Add equations 2 and 3 to eliminate x:

-5y - z = -12   .....4

Multiply equation 2 by - 2:

-2x + 4y  - 2z = 10

Add this to equation 1:

8y + z = 16   ........ 5

Now add equation 4 to equation 5:

3y = 4

y = 4/3 = 1 1/3.

Now find z by substituting for y in equation 4:

-5(4/3) - z = -12

z = 12 - 20/3

z = 36/3 - 20/3 = 16/3 = 5 1/3.

Finally, we find x by substituting for y and z in equation 1:

2x + 4*4/3 + 3*16/3 = 6

2x = 6 - 16/3 - 16

2x =  18/3 - 16/3 - 48/3 = -46/3

x = 23/3 =  7 2/3.

3 0
3 years ago
A property sells for $620,000 two years after it was purchased. If the annual appreciation rate was 4%, how much did the origina
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$25,000 is the answer you would take $620,000 x 0.04 (4%)= 24,800 which rounds to 25,000
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kiruha [24]

Answer:

3/12

Step-by-step explanation:
to rename the fraction with the common denominator of 12, u have to multiply 1/4 by 3/3 to get 3/12. You can check ur answer by simplifying your answer. 3/12=1/4

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Z=16 because if you reverse it and go 13+3=z you get 16
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Joanne has a scale drawing of her backyard that includes a garden bed that measures 26 inches long and 16 inches wide.
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