First of all, you dont have the answers.
But the answer is "Companies replaced hand-operated brakes with air brakes on trains" is the best answer because this stopped many of the fatalities that were caused by brake failures." which is I say on what you are using D
Being ethical is to have standards. If you are spontaneous you aren't really expecting anything you're acting purely on impulse. So I guess no.
Answer: the arrangement between two countries by which each has representatives in the other country
Explanation:
You need interchange the variables and solve for y
