I dont really understand this question, i read through the text i was given but couldn't figure it out, any help?

< 2 and < 3 are vertical angles

< 2 and < 4 are adjacent angles

Step-by-step explanation:

Vertical angles are angles opposite each other where two lines cross.

Two angles are Adjacent when they have a common side and a common vertex (corner point) and don't overlap. they have a common side

-18

step-by-step explanation:

because mean value defines that total sum value over total number of set

if x = 1, then the answer is 3.5