A man has 16 coins in his pocket, all of which are nickels and quarters. If the total value of his change is $1.40, how many of each coin does he have?

Apassenger train and a freight train leave san jose at 3pm, traveling in the same direction. the passenger train is going three times as fast as the freight train. at 6pm they are 240 miles apart. how fast is each travelling? explain your answer and show your