2( 6n - 4) -4( n + 5)

explain how you get it.

First, apply the distributive property.

-2*6n = -12n
-2*-4 = 8

-12n+8 

-4*n = -4n
-4*5 = -20

Now combine like terms.

-12n - 4n = -16n

-20 + 8 = -12

-16n + (-12)  =  -16n - 12

Now we have our final  -16n - 12

Iknow one of the answers is a and maybe b but not 100% sure about b

20 percentage, you can also do it on a calculator.