How to solve problems on this website

You are assembling pieces of an iron gate to complete a fence. the finished gate will look like the one below. in order to assemble the gate it is important to under how the pieces are related. part 1: how are pies 1 and 2 in the archway related? part 2: how are the rectangular sections 5 and 6 in the center of the gate related to each other?

Evaluate 8j -k+148j−k+14 when j=0.25j=0.25 and k=1k=1.

Cd is the perpendicular bisector of both xy and st, and cy=20. find xy.