Help please!! There are two pictures. This is timed. I’ll give brainliest also!

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

Elena and her husband marc both drive to work. elena's car has a current mileage (total distance driven) of 15,000 and she drives 23,000 miles more each year. marc's car has a current mileage of 46,000 and he drives 9,000 miles more each year. will the mileages for the two cars ever be equal? explain.

Simplify the following expression 48^1/2