Determine The domain of this relationship (x, y) y=3/x-5?

How do you convert 1.27 to a percentage

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.

Someone me what is the area of this figure? 18m 18m 8m 16m