What is the correlation coefficient of (5,3), (7.5, 6), (10, 10), (15, 5), and (20,6) ?

The mean temperature for the first 4 days in january was 7°c. the mean temperature for the first 5 days in january was 5°c. what was the temperature on the 5th day?

Find the measure of the interior angles of the following regular polygons: a triangle, a quadrilateral, a pentagon, an octagon, a decagon, a 30-gon, a 50-gon, and a 100-gon.

If sr is 4.5cm and tr is 3cm, what is the measure in degrees of angle s?