Answer:
Since a and b are constant the answer is 6.5
Step-by-step explanation:
g(x) = 2x + 5
g(x) = y
y = 2x + 5
y - 5 = 2x
[tex]\frac{y-5}{2}[/tex] = x
[tex]g^{-1}[/tex](x) = [tex]\frac{x-5}{2}[/tex]
8 = h(1) and h(3) = 26
26 = a(3) + b
a = b
6.5 = 6.5
26 = 6.5(3) + 6.5
26 = 19.5 + 6.5
26 = 26
