ryanghost90
17.03.2021 •
Mathematics
Which of the following ions are involved in the formation of rust?
a) OH+ and Fe+
b) OH+ and Fe3+
c) H+ and Fe+
d) H+ and Fe2+
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Ответ:
answer c
Step-by-step explanation:
https://youtu.be/iXVw2pIFlCk
Ответ:
Sophia wrote the number 41.
Step-by-step explanation:
Let x by the two-digit number written by Sophie. Max appended a 3, so the new number is 10x+3.
The difference between Max's and Sophie's numbers is 372:
(10x+3)-x=372
9x+3=372
9x=369
x=41.
So, Sophie's number was 41.