help asap pls, this is due in 30 minutes.

Help Asap Pls This Is Due In 30 Minutes class=

Answer :

Answer:

I'm not sure sorry

Explanation:

all I know is calcium=1 carbon=1 oxygen=3➡️calcuim=1 oxygen=1+carbon=1 oxygen=2

so overall answer would be (5➡️2+3) so mabey 5+5=10

The other boy has a good answer