Answer:
-8
Step-by-step explanation:
Solve with the slope formula (plug in two points): 
ANSWER

EXPLANATION
The area of a regular polygon is

where 'a' is the apothem of the polygon and 'p' is the perimeter of the polygon.
From the diagram,

a=8sin(60)




The length of one side of the hexagon is 2×4=8.
The perimeter of the hexagon is
p=6×8=48
The area of the hexagon is


3/8 * 100 = 37.5%
To an integer it is 38%
For AD to be parallel 2x+4º should be equal to 79º
2(37)+4 = 78º
78º<79º
Since they aren't equal the lines are not parallel to each other.