Of equations:
twice a number plus three times a second number is negative one. the first number plus four times the second number is
two.

elements make up everything, and they combine to make compounds.

the answer is c

they all get energy from eating other animals, dead animals to be more precise.

hienas tends to steal pray from other animals. crows and vultures tend to eat dead animals and leftovers.

hope it ,

bioteacher101