Ignore the circles stuff and the written numbers i wrote, but can someone me with this question?

Which equations represents circles that have a diameter of 12 units and a center that lies on the y-axis? check all that apply

Simplify the expression. -2/5(10+15m-20n)

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.