The equation is simply 8s where s is the length of a side. There are 8 sides. You are just adding the length of all 8 sides together to get the perimeter.
SINCE the slope is -2 it would be like this -2/1 but first plot the y-intercept onto the graph and go down 2 and over 1.
Answer:
the answer is 1.99 I think im not sure I guessed
Step-by-step explanation:

Recall that

Let

, so that


Since the angle

lies in the second quadrant, you know that the cosine must be negative, so