Answer:
Yes,
is a solution
Step-by-step explanation:
Recall that
. By replacing
in the given trigonometric equation, we get 0 (zero) as a result, so this value is a solution:

Answer:
7. 
8. 
Step-by-step explanation:
We are given two function, f(x) and g(x).
We want to find their addition and their subtraction, and we do this combining like terms.
The functions are:


7. Find (f+9) (x)

So

8. Find (f - g) (x)

So

Answer:
Just plug in 10^2-7.5^2
To get 43.75
Step-by-step explanation:
I hope you figure this out.
Answer:
The number is 24.
Step-by-step explanation:
-1+7=6
6*4=24