Answer:
D) 1
Step-by-step explanation:
When you start raising i to certain powers, you begin to notice a pattern.

This cycle repeats forever. Since 84 is a multiple of 4, i^84 must be 1. Hope this helps!
Answer:
Step-by-step explanation:
-4 + 4x = -pq
Add 4 to both sides
4x = -pq + 4
Divide both sides by 4
x = 
15 is the answer i divided
Alright. (1/4^2)+2((1/4)(2/3)-3(2/3^2)=-.9375 is the correct answer