The sum of two numbers is 52 and the difference is 20. what are the numbers

Given the points a(-2, 1) and b(8, 6), find the coordinates of the point c on directed line segment ab, that partitions ab in the ration 2: 3.

If the scale factor between two circles is 2x/5y what is the ratio of their areas?

Aball is dropped from a height of 10m above the ground. it bounce to 90% of its previous height on each bounce. what is the approximate height that the ball bounce to the fourth bounce?