Alex drives at an average speed that is 2/5 of the average speed that Roy's train travels.
Alex takes 30 minutes to travel 50 km in her car.
Roy travels for 1 hour and 20 minutes on his train.
How far does Roy travel to 2 dp (decimal places)?
pls answer quick

What is the value of x in the diagram below?

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r

Aball is thrown from a height of 139 feet with an initial downward velocity of 15 ft/s. the ball's height h (in feet) after t seconds is given by the following. h=139-15t-16t^2 how long after the ball is thrown does it hit the ground? round your answer(s) to the nearest hundredth. (if there is more than one answer, use the "or" button.) t =