9+8 is the commutative property
The answer is B I asked my dad and he is supppperrrr smart lol
First distribute the 2(2+4x)
3x-4+4+8x
then just combine like terms.
8+11x
therefore
3x-4+2(2+4x)=8+11x<span />
If you add all the numbers on the right together you get -35 then you divide by 5 which gives you the average of -7*F
