Easy math question which figures in the diagram below are vertical angles? there can be multiple answers

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?

Using inductive reasoning, what are the next two number in this set? 2,3/2,4/3,5/4,

Given the system of equations presented here: 2x + 4y = 14 4x + y = 20 which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? multiply the second equation by â’4 to get â’16x â’ 4y = â’80 multiply the second equation by â’1 to get â’4x â’ y = â’20 multiply the first equation by 2 to get 4x + 8y = 28 multiply the first equation by â’1 to get â’2x â’ 4y = â’14