The distributive property is just using a certain type of grouping symbols inorder to distribute a particular operation to everything within that grouping symbol.
in the problem 2(a-2), you distribute the 2 to everything within the grouping symbols, giving you 2a-4 as your final evaluated answer. if they wanted you to solve, you set it to zero as such
2a-4=0
2a=4
a=2
Answer:
A
Step-by-step explanation:

Now replace $x$ by $g^{-1}(x)$ and $g(x)$ by $x$ and you have your answer.
Answer:
C
Step-by-step explanation:
(6 * 4 ) * 2 = 48
( 4 * 12 ) * 2 = 96
( 6 * 12 ) * 2 = 144
48 + 96 + 144 = 288
Ratio would be 7.5 to 2.75....but using whole numbers I'd get:
8 to 3