Adiesel train left berlin and traveled north at an average speed of 25 km/h. a cattle train left at the same time and traveled in the opposite direction with an average speed of 35 km/h. find the number of hours the cattle train needs to travel before the trains are 600 km apart.

10 hours

Step-by-step explanation:

Let represent the distance the train heading north has traveled

Let represent the distance the train heading south has traveled

Let represent the number of hours that has passed

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value

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