What are the two major drainage systems in the United States?

1. Pacific Northwest Basin

2. California River Basin

3. Great Basin

4. Lower Colorado River Basin

5. Upper Colorado River Basin

6. Rio Grande River Basin

this is a good question! i'll do some research and come back when i have the answer!

the answer would be the third option, "no, ariel should have added 9^2 and 12^2 and compared that to 15^2."

this is found through the pythagorean theorem, which is a^2 + b^2 = c^2.

this is the correct way of solving the problem:

9^2 + 12^2 = 15^2

81 + 144 = 225

225 = 225