Which operation can be used with the augmented matrix below?
3 -2 1/15
| 1 5 8 15
1-2 - 31
o switch column 1 and column 2.
o multiply row 3 by 0.
o add row 2 and column 3.
o multiply row 2 by - 1 and add it to row 3.

50- 250 is correct i did that one too

step-by-step explanation:

answer:

your answer is: c. 196 7/8 in^3.

it will cost dollar $540

the living room is 3 which means if we divide 325/3 then we get $108

therefore if 1part of the living room cost $108 and 3 costed $325

then total 5part of the room will cost 5*108 which gives $540

no because mercury has a density of 13.6 grams per centimeter squared while gold has 19.32 grams centimeter squared

step-by-step explanation: