F(x) = 7/x
g(x)=x²+10
Then f(g(x))= 7/(x²+10)
By the way g(f(x))=(7/x)² + 10
Answer:
Y ≈ 59.0°
Step-by-step explanation:
Using the Cosine rule
cosY = 
with x = 22, y = 20, z = 18
cosY = 
= 
=
, then
Y =
(
) ≈ 59.0° ( to the nearest tenth )
168 / 8 = 21. It is in simplest form at 21.