Answer:
3x + (2x + 4) is equivalent to (3x + 2x) + 4
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Explanation:
The two equinoxes. Spring (or Vernal) Equinox, and Fall (or Autumnal) Equniox.
As far as largest, its the pacific plate. Smallest has two answers: Juan De Fuca, off the coast of the American Northwest, is the smallest major plate, but of all plates, major and minor, the smallest is the Galapagos microplate.
From smallest to largest it would be individual, population, community, ecosystem, biome, and then biosphere.