Which expression is equivalent to (-3)x+(-3) (-12)?

Gold is not now being extracted from seawater. why not? a. it would be too disruptive to marine life to develop any marine mineral resources b. there is no gold in seawater c. we don't know how to extract minerals from seawater d. it would be too costly and difficult to separate the small amount of gold from the very large amounts of halite and other minerals

What weather system might be occurring if the pressure gradient decreases and fish harvests in peru are weaker than normal

Hey, i was what is consisted in a sustainable city? like what unique designs they have, etc. for answering ; )