What is the distance between (2,9) and (-7,15)

Two lines parallel to a third line are parallel to each other. always sometimes or never

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.

Drag each tile to the correct box. not all tiles will be used. consider the recursively defined function below. create the first five terms of the sequence defined by the given function