How do i find the variable and leave in fraction 3 + 8/7d = -1

For how answer my question this will be the last question can you answer in math subject

If chord ab is congruent to chord cd, then what must be true about ef and eg?

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.