Answer:
REFLECTION
Step-by-step explanation:
The triangle ABC was reflected over the x-axis to get triangle A'B'C'.
The theorem proving the triangles' congruence is Angle-side-angle (ASA) and the angle corresponding to Q is S; therefore, the answer is B.
QPR = STR; ASA
Answer is -8
(-1)+(-7) turns into (1)+(7)=8 and then back to original which will be -8