How would you solve ((-x^2)-(12x^3)-8)^2

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

2y= 3 2 x−2 y = − 1 3 x + 1 y=− 3 1 x+1

The swimming pool is open when the high temperature is higher than 20∘c. lainey tried to swim on monday and thursday (which was 3 days later). the pool was open on monday, but it was closed on thursday. the high temperature was 30∘c on monday, but decreased at a constant rate in the next 3 days. write an inequality to determine the rate of temperature decrease in degrees celsius per day, d, from monday to thursday.