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Ivahew [28]
3 years ago
15

Can somebody help me with this problem?

Mathematics
1 answer:
Dmitriy789 [7]3 years ago
3 0
A=bh
A=53*47
A=<span>2491cm^2</span>
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The augmented matrix of a system of equations has been transformed to an equivalent matrix in​ row-echelon form. Using​ x, y
jenyasd209 [6]

Answer: The system of equations is:

x + 2y + 2 = 4

y - 3z = 9

z = - 2

The solution is: x = -22; y = 15; z = -2;

Step-by-step explanation: ONe way of solving a system of equations is using the Gauss-Jordan Elimination.

The method consists in transforming the system into an augmented matrix, which is writing the system in form of a matrix and then into a <u>Row</u> <u>Echelon</u> <u>Form,</u> which satisfies the following conditions:

  • There is a row of all zeros at the bottom of the matrix;
  • The first non-zero element of any row is 1, which called leading role;
  • The leading row of the first row is to the right of the leading role of the previous row;

For this question, the matrix is a Row Echelon Form and is written as:

\left[\begin{array}{ccc}1&2&2\\0&1&3\\0&0&1\end{array}\right]\left[\begin{array}{ccc}4\\9\\-2\end{array}\right]

or in system form:

x + 2y + 2z = 4

       y + 3z = 9

               z = -2

Now, to determine the variables:

z = -2

y + 3(-2) = 9

y = 15

x + 30 - 4 = 4

x = - 22

The solution is (-22,15,-2).

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andrezito [222]
Zoom factor will be the number to prove they’re the same
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PLEASE HELP WILL MARK BRAINLIEST
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Answer:

4th dot

Step-by-step explanation:

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Answer:$80.24

Step-by-step explanation:68*0.18(18%)

12.24

68+12.24=$80.24

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Helen has 112 coins she has 8 times as many coins as jake how many coins dose jake have in his collection
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Jake has 14 coins in his collection. 112 divided by 8 equals 14.
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