Answer:
f(x)^-1=x+12
Step-by-step explanation:
f(x)=x-12
y=x-12
x=y-12
y=x+12
Hope it helps.
c = 60
A triangle = 180 degrees
180-(15+105)=c
c=60
Yes, the ratios do form a proportion.
S1 is congruent to S2