Answer:- The first and third statement include two quantities in the real world that are additive inverses.
Explanation:-
- <em>Additive inverse of a number is a number such that when it added to the given number gives zero.</em>
1. An elevator goes up 10 stories and then goes down 10 stories.
⇒ The position of elevator =10+(-10).....[∵ up and down are opposite directions, then their quantities are of opposite signs ]
=10-10=0
⇒These quantities are additive inverses.
2. Daniela opens a bank account and then deposits $200.
⇒ Amount in bank =0+ $200=$200≠0 not additive inverse.
3. Juana drove 25 miles east and then drove 25 miles west.
⇒ The position of Juana= 25+(-25)=25-25=0........[∵ east and west are opposite directions, then their quantities are of opposite signs ]
⇒These quantities are additive inverses.
4. A chlorine ion has 17 positively charged protons and 18 negatively charged electrons.
⇒ Resultant charge=+17+(-18)=17-18=-1≠0 , not additive inverse.
