Here, this website explains it perfectly
Step-by-step explanation:
https://www.k5learning.com/blog/subtracting-positive-and-negative-numbers
Answer:
He should travel directly
Step-by-step explanation:
Given
--- East
--- North
If he goes through east north direction, the distance (d) traveled is:



If he travels directly, the distance (d) is:
---- Pythagoras theorem




By comparison, he will travel the shortest distance if he travels directly because 
<em>Hence, he should travel directly</em>
Answer:
9/5
Step-by-step explanation:
The unit of measurement appropriate for this would be meters^2
Answer:
向きを変えずに形状をスライドさせますか?
Step-by-step explanation:
this translation will not change its orientation