Can someone help me with this question please! I have nooo idea how to complete it!

y = 3 + 4

Step-by-step explanation:

Create 2 equations using values from the table to find a and b.

Using (0, 10), then

10 = acos0° + b ( cos0° = 1 ), thus

a + b = 10 → (1)

Using (90, 4), then

4 = acos90° + b ( cos90° = 0 ), thus

b = 4

Substitute b = 4 into (1)

a + 4 = 10 ( subtract 4 from both sides )

a = 6

Thus

y = 6cosx° + 4

When x = 45°, then

y = 6cos45° + 4 = 6 × + 4 = 3 + 4

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