What is the value of y=4x-x when x =3

Prove that 16^4-2^13-4^5 is divisible by 11.

Item 1 use the polygon tool to draw a rectangle with a length of 4 units and a height of 2 units. one of the sides of the rectangle falls on line ef , and the rectangle has a vertex of e. each segment on the grid represents 1 unit.

Ihave like no idea how to do any of this !