Answer:
1) The factors of
are 
Option C is correct.
3) The factors of
are 
Option B is correct.
Step-by-step explanation:
1) Factor : 
For factoring we need to break the middle term, such that there sum is equal to middle term of expression and product is equal to product of first and last term.
The middle term : -3x
We can break them as (-2x)( -x)
Solving:

So, factors of
are 
Option C is correct.
3) Factor: 
For factoring we need to break the middle term, such that there sum is equal to middle term of expression and product is equal to product of first and last term.
The middle term : 2x
We can break them as (4x)( -2x)
Solving

So, factors of
are 
Option B is correct.
8. 8 is greater than 3 and is all the way to theeft. if it was to the right, you'd need more info
Your answer would be 12/25 tons. If you set up a proportion 2/5 X
-------- = -------
5/6 1
Solve your proportion.
To simplify this, you would have to turn b^-2 into a positive exponent.
To do this, we have to flip b^-2, which would get rid of the negate from the exponent: -2
3a^4 b^-2 c^3 / b^-2
Then we get the answer:
3a^4 c^3
------------
b^-2
I have a picture to clarify!
I hope this helped, let me know if you don't understand! ^.^