(-2x-1)-(x-7)
-2x-x+7-1
-3x+6
-3x=-6
x=2
The correct answer is:
C. The polygon with 8 sides and a concave shape (attached)

The answer is i beleve 75+15n
Answer:
D is the answer
Step-by-step explanation:
-15 Is the same as 15 its just negative but they have the same distance.