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
Luden [163]
3 years ago
14

Solve the following system of equations using Gaussian elimination method. If there are no solutions, type "N" for both xx, yy a

nd zz. If there are infinitely many solutions, type "z" for zz, and expressions in terms of zz for xx and yy.-5x-7y-4z=-66x+2y+3z=-2-1x+2y-7z=0
Mathematics
1 answer:
Anna11 [10]3 years ago
6 0

Answer:

x=-224/229,

y=296/229,

z=118/229

Step-by-step explanation:

-5x-7y-4z=-6

6x+2y+3z=-2

-x+2y-7z=0...........( multiple with (-5) and sum with 1st equation, mult with 6 and                    sum with 2nd equation)

______________

-x+2y-7z=0

-17y+31z=-6.....(mult with 14)

14y-39z=-2.....(mult with -17) then sum

___________

-x+2y-7z=0

-229z=-118, so here we have z=118/229.

14y-39*(118/229)=-2, from here we have y=296/229

-x+2*(296/229)-7*(118/229)=0, we get that x=-234/229

In the same way you can do this in the matrix form>>

You might be interested in
Which line has a larger slope?
nexus9112 [7]

Answer:

the one on the right looks best for the slope because the slope is a lot larger than the one on the right the one on the right is smaller but a few inches few times I don't know you might want to check it before I actually answer it for you so I hope you found this kind of helpful thank you bye

5 0
2 years ago
Find the missing probability. P(A)=7/20,P(A∪B)=191/400,P(A∩B)=49/400 ,P(B)=? A. 7/8 B. 1/4 C. 117/400 D. 19/40
spin [16.1K]

Answer:

B

Step-by-step explanation:

P(AUB)=P(A)+P(B)-P(A∩B)

191/400=7/20+P(B)-49/400

P(B)=191/400+49/400-7/20=240/400-7/20=12/20-7/20=5/20=1/4

8 0
2 years ago
Which equation can be used to find x, the length of the hypotenuse of the right triangle? A triangle has side lengths 18, 24, x.
natima [27]

Answer:

A triangle has side lengths 18, 24, x.

18 + 24 = x

18 squared + 24 = x

(18 + 24) squared = x squared

18 squared + 24 squared = x squared

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
This inequality has a symbol:
wlad13 [49]

Answer:

Because you can't divide by zero.

Step-by-step explanation:

If x = -2, it makes the denominator 0. This will result in the equation being undefined because you can't have zero in the denominator.

6 0
2 years ago
<img src="https://tex.z-dn.net/?f=3x%20%2B%20%28-2x%29%20%2B%202%20%3D" id="TexFormula1" title="3x + (-2x) + 2 =" alt="3x + (-2x
Oduvanchick [21]
The answer is 3x simplified
Evaluated 3x
Find the exact value is 3x
6 0
3 years ago
Other questions:
  • *REMEMBER THAT IN STANDARD FORM YOU CANT USE FRACTIONS!!!
    12·2 answers
  • Write a polynomial function in factored form with zeros at −2, 5, and 6.
    11·1 answer
  • Neep help,please and thank you
    11·1 answer
  • Can anyone help us on this question
    15·1 answer
  • Lulu is taking a road trip to visit family. Her car has a 20-gallon gas tank and the car uses 12 gallons to travel 216 miles.
    12·1 answer
  • By what factor must you multiply a number in order to double its square root? With an example.
    14·1 answer
  • A regular polygon has sides that are perpendicular. What is the measurement of each angle?
    7·1 answer
  • Find the surface area of the figure below.
    8·1 answer
  • pens and pencils are sold in a shop. 12 pencils cost £1.80. the ratio of the cost of a pen to the cost of a pencil is 7: 3. work
    6·1 answer
  • Select all true statements
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!