Which line shows the first error? 4x+8=2x-10

Select all the statements that apply to this figure

Which graph has figures that can undergo a similarity transformation to justify that they are similar? (obviously not the third one)

Square a has a side length of (2x-7) and square b has a side length of (-4x+18). how much bigger is the perimeter of square b than square a?and show all work! you so