Answer:
C. ∠SOE and ∠DOA
D. ∠EOA and ∠DOS
Step-by-step explanation:
Vertical angles are congruent angles.
From the given figure, the vertical angles are...
∠SOE and ∠DOA
∠EOA and ∠DOS
<u>---------------------------</u>
Since you said angle, I assume you mean a triangle, so:
Take the number of the angles you have and add them, then, subtract it by 180. It gives you the missing angle of your triangle!
Answer:
x should be 1
I think if you substitute it will just be the index 2 that remains , not sure though .You should probably ask your teacher for assistance
Answer: 
Step-by-step explanation:
Given
Speed of boat 



Without context, d^3 + e^3 is equal to the equation you just showed.