Todd drives to work- 55 miles one way in 1.4 hours and then drives home in 2 hours- what is his velocity?

It's just speed, distance, time 

Speed = D/T 
Distance = SxT 
Time = D/S 

Therefore Speed (or velocity) = D/T = 55/1.4 = 39 MPH rounded up - FOR JOURNEY 1 

Velocity = D/T = 55/2 = 22.5 MPH - FOR JOURNEY 2 

To work out his average speed (velocity) you add these together and divide by 2 

Average = (39+22.5)/2 

Answer = 30.75MPH or 31MPH rounded up 

Hope this helps :) + If I'm wrong I'm sorry lol

A. they hold atoms  together with a molecule.its a force that exist between molecules. hope this .