Question

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Answer 1

You would probably need to write this in row echelon form, or at least that's the way I would solve it.

Answer 2

Its homework but has 4 options,
A) Add row 1 to row 2.
B) Multiply row 1 by 1/10
.
C) Add 5 times row 1 to 10 times row 3 to obtain a zero in the third row, second column
position.
D) Multiply row 2 by 1/6
.

Answer 3

You want to get this matrix into a nice little form called the row echelon form, where you have 1's on the left of every row, with a right triangle shape:
1 - - - -
0 1 - - -
0 0 1 - -
0 0 0 1 -
0 0 0 0 0.....

Answer 4

This is so that you solve for one variable at a time, rather than taking on all 3 variables at once, and then plugging in your newly acquired value into the row above it, until you reach the top.

Answer 5

Oooh bad grammar, now it's bothering me >.<

Answer 6

so the answer is d then?

Answer 7

That seems to make the most sense. You'd be completing that row in terms of this form, so I think that is correct.

Answer 8

alright ty