Answer: 100+10+1
You basically place zeroes instead of the actual digit to find the value of each number.
Example:
855
800+50+5
Y=.5x+6
I believe this is right sorry if it’s not.
Answer:

Step-by-step explanation:
Let

We factor 2 to obtain;

We factor the polynomial within the parenthesis by grouping.



We apply difference of two squares on the second factor: 

We now compare to;

It is now obvious that 
Answer:
A no. is correct one
Step-by-step explanation:
Hope it will help you. and please mark me brilliant