2) (-8) + (-1)
4) (-6) +12
6) 11+(-2)

PLEASE ANSWER

Ammonia molecules have three hydrogen atoms and one nitrogen atom.how many of each atom arein five molecules of ammonia

Ineed in figuring out this problem.

An account with a $250 balance accrues 2% annually. if no deposits or withdrawals are made, which graph can be used to determine approximately how many years will it take for the balance to be $282? it's e2020 ni️️as