The answer is D. (Russia)
Answer: North Dakota
Explanation: The geographic center of North America is set near Rugby, North Dakota 48°10′N 100°10′W, though this has no official status.
-4x^2-4xy+6y^2 hope this helps
Got this from google, scientists count a species population by first knowing the population in a certain area or small geographical sample location then multiply the result by the total area.
Answer:
The year the Greek city of Helike disappeared is -⅕ times the year the US Civil War ended. Let w represent the year the Civil War ended.
Explanation: