Acar travels 15 kilometers west in 10 minutes. after reaching the destination, the car travels back to the starting point, again taking 5 minutes. what is the average velocity of the car?

Velocity = (displacement) / (time)

'Displacement' is the distance between the start-point and end-point,
so the car's displacement is zero, and its average velocity is zero.

However,  Speed = (distance covered) / (time to cover the distance).

The car covered a distance of 30 km in 15 minutes,
so its average speed is

     (30km) / (0.25 hour)  =  120 km/hr.

'Velocity' is not simply a word you use for 'speed' when
you want to sound smarter.  They're two different things.

Iwould sure like to answer your question but i honestly just don’t know

3x + 2x = both people using the same measure of like 5x = x= 25 meters per second. 25ms. it takes them 4 seconds to