Explanation:
I assume the "-1" function is the inverse function.
and not 1/function.
g(x) = y = (-x + 9)/5
the inverse function is
5y = -x + 9
5y - 9 = -x
-5y + 9 = x
now renaming y to x abd vice versa to Mahe this an official function :
y = g-¹(x) = -5x + 9
(g-¹ × g)(-1) = (-5×-1 + 9)×(--1 + 9)/5 =
= (5 + 9)×(1 + 9)/5 = 14×10/5 = 14×2 =
= 28
h-¹(3) means the x value when h(x) = 3.
so,
h-¹(3) = 2