Simplify to create an equivalent expression. −4(z+3)−4(5−4z)

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?

Hi my sisters and brothers can tell me the answer because i don’t understand the question

What is always true when two whole numbers are subtracted?