Answer: dude you can do this yourself.
Step-by-step explanation:
toss coins ;-;
It's 0 because 10+10 = 20 then subtract 20 and you get zero.
Answer:


Step-by-step explanation:
i is an imaginary unit, this means

Rewrite -5 as 
then

Rewrite -25 as 
then

Answer:
D..........
Step-by-step explanation:
rgW