Asegment has endpoints at (15,−11) and (42,−11). how many units long is the segment? 57 units 27 units 26 units 22 units

Madeline takes her family on a boat ride. going through york canal, she drives 6 miles in 10 minutes. later on as she crosses stover lake, she drives 30 minutes at the same average speed. which statement about the distances is true?

Which one is the correct answer, and why?

Prove that 16^4-2^13-4^5 is divisible by 11.