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 answer to this question is 30.
Answer:
An item in a set is called an element.
Step-by-step explanation:
I hope this helps.
280 divided by 7 = 40 pages every night
(28/7=4, add a zero)