Please help with this

Is δ pmr similar to δ smn ? if so, which postulate or theorem proves these two triangles are similar?

It takes a total of 6 hours to fill up an inground backyard pool using a standard house. a function can represent this situation to represent the amount of water in the pool until it is full a function of time the hose is running. determine the domain for the function

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10