Answer: 
Step-by-step explanation:
For this exercise it is important to remember the following:
1. By definition, the "Product" is the result of a multiplication.
2. The "Difference" is defined as the result of a subtraction.
3. The Distributive property states that:

Keeping the above on mind, you know that:
"The difference of
and
" can be represented with the following expression:

Therefore, "The product of -13 and the difference of
and
" can be represented with this expression:

Finally, you must apply the Distributive property in order to simplify the expression. You get:

Answer:
C
Step-by-step explanation:
Since EF and GH are parallel lines then
∠EGF = ∠GFH = 60° ( Alternate angles )
For this case we have the following functions:

We have to:
is given by:

Thus, the correct option is the option is A.
On the other hand,

Thus, the correct option is the option is A.
We also have:

Thus, the correct option is the option is B.
Last we have:

Thus, the correct option is the option is C.
ANswer:
Option A, A, B, C