Which of the following would simplify to be the additive identity?

2 · 0
2 0
2 1
2 -1

Why do interests rates on loans to be lower in a weak economy than in a strong one

Bugs bunny was 33 meters below ground, digging his way toward pismo beach, when he realized he wanted to be above ground. he turned and dug through the dirt diagonally for 80 meters until he was above ground

How can you tell when x and y are not directly proportional?