-15=v+11 what’s the answer

What is the common difference in the following arithmetic sequence? 7,3,-1,-5

The depreciation per unit for a company

What can be said about the relationship between triangles and circles? check all that apply. a) many circles can be inscribed in a given triangle b) exactly one triangle can be inscribed in a given circle c) exactly one circle can be inscribed in a given triangle d) many triangular shapes can be circumscribed about a given circle