Problem text:

solve using the gaussian elimination method
2x+y-3z=4
4x+2z=10
-2x+3y-13z=-8

I think I figured out the variable z (z=0)
I multiplied the top line by -3
-6x-3y-9z=-12, then I add it to line 3
-2x+3y-13=-8 which gives me
-8x -21z=-20

4x+2z=10, I multiplied line two by 2
8x+4z=20 and added it to
-8x-21z=-20, which gives me
-17z=0, divde by coefficient
z=0/-17
z=0

I am not sure if this is right and this is where I am stuck at.............

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Problem text:

Q. Solve the equation using the Gaussian elimination Method

3x-2y-6z=-4
-3x+2y+6z=1
x-y-5z=-3

I stuck on this one.

Problem text:

Q. solve using the gaussian elimination with back substitution or Gauss-jordan elimination

x-3z=-2
3x+y-2z=5
2x+2y+z=4

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Problem text:

What is the 100th digit in the decimal representation of 1/7? Explain how you determined the solution.

Problem text:

Use a calculator to evaluate the following expression. Please explain steps involved for using a calculator to evaluate this expression.

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Problem text:

Use a calculator to evaluate the following expression. Please list out steps as how to use a calculator to evaluate this expression:

12.3 + 18.276/3 X 1.04

Problem text:

I want to express four one-hundreths of one percent of 250,000,000 as a percentage with a decimal. I think it's expressed as 0.0004%

40 out of 100,000 1/2500th is also 0.0004% ?

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Problem text:

Q. Evaluate the expression without a calculator.
log^12 1

note: the 12 is a lower exponent of the log.

Problem text:

Q.evalute the expression without a calculator

log_10_100

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Problem text:

8+6*3-5*4 simplify