A cruise ship made a trip to Vancouver and back. The trip to Vancouver took 8 hours, and the trip back took 12 hours. The ship averaged a speed of 18 km/h (kilometers per hour) on the trip back. What was the ship's average speed on the trip to Vancouver?

He expression 2(l + w) is used to calculate the perimeter of a rectangle, where l is length and w is width. if the length is fraction 2 over 3 unit and the width is fraction 1 over 3 unit, what is the perimeter of the rectangle in units? fraction 2 over 3 unit 1 unit 1fraction 2 over 3 units 2 units

1. during first 10 seconds 2. between 10 seconds and 35 seconds 3. during 35 seconds to 40 seconds

Find the distance between the point (-3,-4), and (see the picture below)