Need in all asap and is the graphing right ? if not me with that two ! : ))

How many triangles can be drawn with side lengths 4 centimeters, 4.5 centimeters, and 9 centimeters? explain

Side xy of triangle xyz is extended to point w, creating a linear pair with ∠wyz and ∠xyz. measure of an exterior angle what is the value of x? 64 80 100 180

An equation in slope-intersept form the lines that passes thought (-8,1) and is perpindicular to the y=2x-17.