Answer:
1
Step-by-step explanation:
Since h(x) = -1x, we multiply 1 by -1. This gives us -1. Since g(x) = x-1, we take -1 and take 1 away from it. This gives us -2. Since f(x)=1, our answer is one.

Thickness of the book is ~
Refer to the attachment for solution ~
Answer:
426 chickens
Step-by-step explanation:
let the pigs = x
the ducks = 2×x = 2x
the chickens = 3×(2x) = 6x
x +2x +6x = 639
9x=639
x = 639/9 = 71
the chickens = 6x = 6×71 = 426