Can someone explain this to me I don’t get it

Iwill give brainliest only if your correct the words subsequent and submerge both contain the prefix sub. based on this information, what does the prefix sub most likely mean? a) under or secondary b) true or verifiable c) tricky or difficult d) around or centered on

In the diagram of circle a what is m

What value of x is in the solution set of 4x - 12 s 16 + 8x? -10 -9 -8 -7