Velocity of the ring wraiths relative to the air:
The speed 
is what we want to find - this is the speed at which the wraiths are flying in the air.
(Note: 
denotes velocity, while 
denotes speed)
Velocity of air relative to the ground:
The ring wraiths want their trajectory to be due north, which means their velocity relative to the ground should be
To an observer on the ground, 
is the speed at which the wraiths would appear to be moving in the air.
The relative velocities satisify
Answer:
i think its the third one correct me if im wrong 0:)
The variable is b, the coefinet is 1/3
remember
ab-ac=a(b-c)
1/3b-1/3=1/3(b-1)
there, factored
The first step to simplify this equation is to multiply the numbers
1512
×
next,, youll multiply the terms with the same base by adding their exponents
1512
finally,, youll add the numbers together
1512
since you cant simplify any further,, the correct answer to your question is 1512
let me know if you have any further questions
:)
