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Anna71 [15]
2 years ago
10

Please help I have no clue how to do this

Mathematics
1 answer:
REY [17]2 years ago
3 0

answer:-2/-4

hope its right and help u

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Rufina [12.5K]
The correct answer should be D
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Solving two step equations​
poizon [28]
Answer: y=66
I hope it helps you!
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2 years ago
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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).

4 0
3 years ago
The question with the distributive property
kondor19780726 [428]

6(a+2b+3c)

=(6)(a)+(6)(2b)+(6)(3c)

=6a+12b+18c

Hope this helps




7 0
3 years ago
Patterns find next 2 numbers 1.) 7,4,1,-2,__,__ <br> 2.) 1,4,9,16,__,__ <br> 3.) 0,1,8,27,__,__
kati45 [8]

Answer:

1. 7, 4, 1, -2, -5, -8

2. 1, 4, 9, 16, 25, 36

3. i'm not sure about this one.


3 0
3 years ago
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