Under which law were wolves reintroduced into the wild
a. national environment policy act
b. resource conservation and recovery act
c. endangered species act
d. national forest management act

try using substitution:

x + y - 6 = x - y. (i'm not giving you the exact answer). since 0 = x - y, then sub 0 in the equation with x - y. combine your like terms, and then use inverse operations, and you'll have your answer.

: -)

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex

the answer is c. it will give up it's valence electron to the other atom.