Answer:
Step-by-step explanation:
Let's start with distributing: 
Simplify i with i in the second term, and rearrange.
. Since i in the denominator looks ugly, let's multiply top and bottom by i. 
. The middle passage is based on the fact that, by definition, 
i belive that the answer is true
:) hope this helps!
Answer:
About $1.86
Step-by-step explanation:
It could be rounded to $1.90.
Answer: 13
Step-by-step explanation:
12^2+5^2=13^2
