Arrows on a line mean that the line continues forever in that direction. If there are two arrows in both directions along a line, then you have a geometric line. If you only have one arrow, then it is a ray. Having no arrows indicates a segment.
I don’t know? I only joined so I could talk to my Friends/siblings
X = 8
because 8 x 2 = 16
16 - 9 = 5
5 x 3 = 15
When you solve that you get 30.825 because you divided 123.3 which was your dimensions times 9 and if you divide that by 4 you get 30.825 . Let me know if that is correct if not I will find new solution!