Answer:
54 i think
Step-by-step explanation:
Step-by-step explanation:

Using the Pythagorean identity, the value of the cosine ratio is 
<h3>How to determine the cosine ratio?</h3>
The given parameter is:

By the Pythagorean identity, we have:

So, we have:

This gives

Evaluate

Take LCM

This gives

Take the square root of both sides

Cosine is positive in the fourth quadrant.
So, we have:

Hence, the cosine value is 
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Answer:
3rd answer
Step-by-step explanation:
a linear function is a straight line.
so, h(x) = 2x is one.
you recognize a linear function by seeing that the maximum exponent of x is 1.
(g○f○h)(9) = g(f(h(9)))
h(9) = 2×9 = 18
f(2×9) = (2×9)⁵ - 1
g(f(2×9)) = 5((2×9)⁵ - 1)²