Answer:


Step-by-step explanation:
Lets call
the the still-air speed of the plane and
the speed of the wind. On the first part the speed of the plane relative to the ground will be
, and on the second part it will be
.
We know that the distance d=400 miles on the first and second parts are the same, so by the definition of velocity we will have:


Or:


Adding both equations:


Which for our values is:

If instead of adding, we substact, we would have:


Which for our values is:

Answer:
x=1.46497
Step-by-step explanation:
Answer:
0.01
Step-by-step explanation:
Answer:
15m
Step-by-step explanation:
did the math
The answer is A. Because if you subtract 3 from 23 it will be 20 and 20 divided by 2 is 10