Answer
Subtract
from 
then;

Remove the bracket we have;

Like terms are those terms which have same variable to the same power.
Combine like terms;

Therefore, Subtracting
from
we get 
Answer:
52 / 27
Step-by-step explanation:
8 mi/s = 12.8 km/s
At this rate, in 2 seconds Jupiter will travel 25.6 km.