Ann drove to the store km north of her house and then drove to the library, which is 5 km south of the store. she drove a total distance of 15 km. what was ann’s displacement?

Answer : The question is incomplete, the complete question is attached in answer

To calculate the displacement by Ann's driving from north of her house to south;

we have the data as 

In north - 10 km
in south - 5 km
total - 15 km

So we can calculate the displacement, which will be,

10 - 5 = 5 km.

Hence, the displacement will be 5 km