The correct answer to the first question is: A'(-5, 6)
The second answer is un-answerable, because the pictures you have provided do not display triangles.
Check the picture below, that's the "inscribed angle theorem"
Answer: b
Step-by-step explanation: 19 x 3 = 57 & 12 x 3= 36 so subtract 57 and 36 that’s going to give you 21 & 21 plus 6 is 27