Answer:
Let Greg's height be = x
According to the question;

So, Greg's height (x) = 15 years
Answer:
The answer should the second Arrow option.
Step-by-step explanation:
I'm not into this subject well so, <em>so sorry if its wrong</em>..
This type of test is in K12 which is my school.
So one trip = 4 km
two trips = 8
8 + 4 = 12
i believe your answer is 12
Thanks!