Answer:
45
Step-by-step explanation:
Assuming f∘g, it is the function composition of two given function. So, f(g(x))=(f∘g)(x).
Function Composition is when we nest two functions creating another one, so if we nest f(x) and g(x) we'll have another one f(g(x)).
If f(x)=4x+1 and g(x)=x^2-5, (fg)(x)
If we replace x in the second function, namely, g(x) then we have:
f(g(x))
Now, let's plug it in the value of 4 for x