Answer
Step-by-step explanation:
Kinetic energy possessed by moving train is

.
And mass

.
The formula for kinetic energy is

.
Solve for velocity:


Now put in the data:
Answer:
sience -2 is to the left of 2
_
. 3
Answer:
The answer is high inflation
Step-by-step explanation:
The relation is <em>not a function</em> if any x-value is repeated.
Assuming you have
(x, y) = (3, 10), (__, 20)
if x = 3, the relation is not a function.