HELP PLEASEE!!
Could I have the answers or step by step because I am stuck please tell me!! :)

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.

The area of a circle is equal to 1 dm². find the radius of the circle.

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