What is the unit rate if 30 minutes for $ 1.25

Can (3,5 and square root 34) be sides on a right triangle?

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.

9/10 divide by -3/15 as a mixed number