The 2 blue parallel lines because they are parallel :)
The slopes of perpendicular lines are opposite and reciprocals.
Answer:
take a ruler and measure each side and add it together.
and what's with the title
Step-by-step explanation:
Option 1! If you expand the bracket and simplify.
We need to know the definition of the "combined function" h(x). I'm going to guess--by looking at answers--that the function is

making it

This function is undefined wherever the denominator is equal to 0 (division by zero is undefined). Factor the denominator.

The two values of x that make the denominator 0 are 3 and -3, otherwise written

.