One leg of a triangle in the rectangular coordinate system has vertices (3,5) and (6,9) determine the length of this leg of the triangle

David must install fencing around a lot that is shaped like a right angle.the side of lot that runs east-west is 200 ft long.the side of the lot runs north-south is 125 ft long.calculate how many feet of fencing he will need to surround the entire lot.

Adele is five years older than timothy. in three years, timothy will be 2/3 of adele’s age. what is adele‘s current age?

Can someone show me step by step how to do this?