I NEED HELP PLS I DONT UNDERSTAND

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.

Write an equation for the function that includes the points (1,4/5) and (2,2/3)

Define multiplicative inverse. give an example of a number and its multiplicative inverse.