PLEASE HELP ASAP
Write the equation that represents the trigonometric graph

y = 300 cos(π/8x) + 400

Step-by-step explanation:

y = A cos(B(x + C)) + D

amplitude is A = (700 - 100)/2 = 300

B is 2π/Period = 2π/16 = π/8

phase shift is C (positive is to the left) = 0

vertical shift is D = 400

y = 300 cos(π/8x) + 400

for this pair of functions g(x)=x-2 and f(x)=|x| is (g o f)(a)= |a| -2

step-by-step explanation:

g(x)=x-2

f(x)=|x|

(g o f)(a)=?

(g o f)(x)=g(f(x))

(g o f)(x)=g(|x|)

(g o f)(x)=|x|-2

(g o f)(a)=|a|-2