Which ordered pair is a solution of the equation? − 3 x + 5 y = 2 x + 3 y −3x+5y=2x+3y

"a.) well–developed vascular system."

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.

colors do exist. the color of the sky is actually violet; humans percieve the color of the sky as blue.