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:
x=78
Step-by-step explanation:
the sum of all angles in a triangle=180
180-59=129
y>x
70+59=129
180-129=51
129-51=78
x=78
Phytagorean Theorem i think
Answer:
3/8
Step-by-step explanation:
Rearrange, find common denominator.

50 I think. 2 1/2 times 20 minutes equals 50