In a lab, a substance was cooled by 36°c over a period of 9 hours at a constant rate. what was the change in temperature each hour?

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

Angle mno is s rotated 180 degrees counterclockwise about the origin to form angle m’n’o’. which statement shows the measure of angle m’n’o’?

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