1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Murljashka [212]
3 years ago
10

Please please please help!! i need this asap and i have no where else to go!

Mathematics
2 answers:
nadezda [96]3 years ago
7 0
1   1   1        2
2  -3   1      -11            -2R1 + R2 → R2
-1  2  -1        8                R1 + R3 → R3

1    1    1      2
0    -5  -1   -15             R2 ⇔ R3
0    3    0     10

1    1    1      2
0    3    0     10             -R3
0   -5   -1    -15

1    1    1      2
0    3    0     10             1/3 R2
0    5    1     15

1    1    1      2                   -R2 + R1
0    1    0     10/3             -5R2 + R3
0    5    1     15

1    0    1      -4/3              
0    1    0     10/3             -R3 + R1
0    0    1      -5/3

1    0    0       1/3             
0    1    0     10/3           
0    0    1      -5/3

Therefore, x = 1/3, y = 10/3, z = -5/3
shusha [124]3 years ago
5 0

Answer:

Option B is correct!

Step-by-step explanation:

solving using Gauss-Jordan elimination

      x y z b

1 1 1 1 2

2 2 -3 1 -11

3 -1 2 -1 8

Finding  the pivot in the 1st column in the 1st row

       x y z b

1 1 1 1 2

2 2 -3 1 -11

3 -1 2 -1 8

Multiplying  the 1st row by 2

       x y z b

1 2 2 2 4

2 2 -3 1 -11

3 -1 2 -1 8

Subtract the 1st row from the 2nd row and restore it

       x y z b

1 1 1 1 2

2 0 -5 -1 -15

3 -1 2 -1 8

Multiplying  the 1st row by -1

        x y z b

1 -1 -1 -1 -2

2 0 -5 -1 -15

3 -1 2 -1 8

Subtract the 1st row from the 3rd row and restore it

       x y z b

1 1 1 1 2

2 0 -5 -1 -15

3 0 3 0 10

Make the pivot in the 2nd column by dividing the 2nd row by -5

      x y z b

1 1 1 1 2

2 0 1 1/5 3

3 0 3 0 10

Subtracting  the 2nd row from the 1st row

       x y z b

1 1 0 4/5 -1

2 0 1 1/5 3

3 0 3 0 10

Multiplying the 2nd row by 3

      x y z b

1 1 0 4/5 -1

2 0 3 3/5 9

3 0 3 0 10

Subtracting  the 2nd row from the 3rd row

       x  y     z       b

1 1 0 4/5 -1

2 0 1 1/5 3

3 0 0 -3/5 1

Making  the pivot in the 3rd column by dividing the 3rd row by -3/5

      x y z b

1 1 0 4/5 -1

2 0 1 1/5 3

3 0 0 1 -5/3

Multiplying the 3rd row by 4/5

      x y z b

1 1 0 4/5 -1

2 0 1 1/5 3

3 0 0 4/5 -4/3

Subtracting the 3rd row from the 1st row and restore it

      x      y z b

1 1 0 0 1/3

2 0 1 1/5 3

3 0 0 1 -5/3

Multiply the 3rd row by 1/5

      x y z b

1 1 0 0 1/3

2 0 1 1/5 3

3 0 0 1/5 -1/3

Subtract the 3rd row from the 2nd row and restore it

      x y z b

1 1 0 0 1/3

2 0 1 0 10/3

3 0 0 1 -5/3

Here

x = 1/3

y = 10/3

z=-5/3

You might be interested in
How do you construct a line segment perpendicular to the segment given through the point given?
maw [93]
Use the opposite reciprocal of the slope of the known line segment, then plug the point given as well as the opposite reciprocal of the slope into y = mx + b
8 0
3 years ago
PLEASE ANSWE
NNADVOKAT [17]

Answer:

1. y=x

2. y=x^3

3. y=x^2

Step-by-step explanation:

The parent function is any one of the 12 basic functions before transformations.

The 12 basic functions can be found here: http://www.learntutoring.com/LTS_References/Math/Precalculus/12%20Basic%20Functions.pdf

3 0
3 years ago
miguel is designing shipping boxes that are rectangular prisms. the shape of one box, with height h in feet, has a volume define
Dimas [21]
The zeros are 5 and 6 on the graph and it looks like it is going the opposit way
5 0
3 years ago
Read 2 more answers
What is the variable in 5 + 12w
wolverine [178]

the variable in this question would be........................ W

you are welcom

8 0
3 years ago
Read 2 more answers
Use calculus to find the area a of the triangle with the given vertices. (0, 0), (6, 2), (4, 8)
Vilka [71]

The area of the triangle with vertices  (x_1,y_1),(x_2,y_2),(x_3,y_3) is

\frac{1}{2}\left|\begin{array}{ccc}1&x_1&y_1\\1&x_2&y_2\\1&x_3&y_3\end{array}\right|.

Inserting numerical values, the are of the triangle with vertices (0, 0), (6, 2), (4, 8) is

\Delta = \frac{1}{2}\left|\begin{array}{ccc}1&0&0\\1&6&2\\1&4&8\end{array}\right |\\
\Delta = 0.5(48-8)\\
\Delta = 20 \;square\; units


7 0
3 years ago
Other questions:
  • Help me!!!!!!!!!!!!!!!!!!!!!!
    12·1 answer
  • Which ordered pair is the solution to the system of equations?
    13·2 answers
  • A triangle has a bottom left angle of (x + 15) degrees and a bottom right angle of (x degrees). 1 parallel and horizontal line s
    13·1 answer
  • The product of two whole numbers is 360 and their sum is less than 100. what are the possibilities for the two numbers?
    11·2 answers
  • A student worked out the following problem to find
    10·1 answer
  • What is -3x-4+4x=16 I'm two steps equations with distribution
    11·1 answer
  • Can someone please help me with this question
    9·2 answers
  • Jorden wanted to leave a 15% tip on a $48.00 bill. What amount should he leave?
    12·2 answers
  • Can you simplify <br>9 3/5%​
    9·1 answer
  • How many two digit numbers have on odd digit and one evan digit?
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!