Systems of linear equations i really dont know how to do this : ')

Convert 2000 swiss francs to dutch guilders

How to do this , and can some one explain

Meghan has created a diagram of her city with her house, school, store, and gym identified. a. how far is it from the gym to the store? b. meghan also wants to walk to get some exercise, rather than going to the gym. she decides to walk along arc ab. how far will she walk? round to 3 decimal places.