Answer:
156
Step-by-step explanation:
6×12=72
7×12=84
72+84=156
f(x)=x²-25=(x-5)(x+5)
g(x)=x-5
(f/g)(x)=<em>(x-5)</em>(x+5)/<em>(x-5)</em>=x+5; for x≠5
D=R-{5}
l=27
b=2×35=70
2l=124-70=54
l=54/2=27
It's B, I'm only trying my best since there is no picture.
