Answer:
s= -1
Step-by-step explanation:
-11111111122647373738374848384747374747477347474
2a(b+3+4bc)
just take out the greatest common factor :)
Answer:
8.37
Step-by-step explanation:
Without any calculations it's evident it can't be neither B (both numbers are even, so they're divisible by 2) nor C (the numbers end in 0 and 5, so they're divisible by 5).
A.

Both numbers have a factor of 3, so they're not relatively prime.
That means it must be D. But, let's check it.

Indeed, those two numbers are relatively prime.