0.216 would be the decimal equivalent of this. Hope this helps you :)
Using the Definition of average speed, we have:

Obs: approximate results
Letter DIf you notice any mistake in English, please let me know, because I'm not native.
Answer:
40°
Step-by-step explanation:
Both angles are opposites so together they equal 180.
180 - 140 = 40
I hope this helps!!
The rule for a 270° counterclockwise rotation is (x, y) ---> (y, -x).
So if you rotated (-5,5) 270° counterclockwise around the origin the new coordinates would be (-5,-5).
Hope this Helps!!