I believe its c i might be wrong
Answer:
Step-by-step explanation:
We have

So we find GCD = 1
2) By back substitution we get
71407 (543) - 19387(2000) =1
So x = 543 and y = -19387
Because we got 71407 (543) - 19387(2000) =1
y cannot be positive
y can only be negative
I think the answer might be C
Answer:
It is 7 hours and 50 minutes