Sure what is it there is no pictuer
Divide 384 by 12 then multiply it by 5 to give you 160
24 cause 25% is basically 1/4 so its 4 times 6 so its 24
It should be 121, or +4 or -4 from that. But I am pretty sure it is 121
If point A is between B and C, then CA+AB = CB by the segment addition postulate. This is the idea of taking two smaller segments to "glue" them together to form a larger segment. Or you can think in reverse: take some larger segment and split it somewhere in between the endpoints (not necessarily the halfway point), this will produce two smaller segments.
For example: you have a ruler that is 12 inches. Take a saw and cut the ruler at the "2 inch" marker. You'll end up with two smaller pieces of plastic: one of which is 2 inches, the other 10 inches. The two smaller pieces can be taped together to reform the original 12 inch ruler.