Which are differences of perfect cubes? Select two options

9a^3-27
125a^12-72
216-27y^3
8a^15-27
225a^3-216

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?

5(-9w) put expression in distributive property

The marriott family bought a new apartment three years ago for $65,000. the apartment is now worth $86,515. assuming a steady rate of growth, what was the yearly rate of appreciation? what is the percent of the yearly rate of appreciation?