Answer:
Step-by-step explanation:
1 1/5
63
All the angles inside the triangle must = 180
So 180 - 62 - (angle1) = ?
Angle 1 is { 180 - 125 = 55}
180 - 62 - 55 = 63
r o s(3)=?
s(x)= x²-1
x=3
s(3)= 3²-1
s(3)= 9-1
s(3)=8
r(8)
r(x)= -2x-1
x=8
r(8)= -16-1
r(8)= -17
r(s(3))= -17
