Well first, you have to know the distance formula. You plug the coordinates into it and you get the answer.

√1² + -7² = d
d = 7.1
The greatest number common to 50 and 10 is 10
10 is the answer
hope this helps
They are equal...1/5 is half of 2/10
Answer:
2.
Step-by-step explanation:
The common difference is 5 so the first number is 7 - 5 = 2.