Hello,
To solve this function for f(4) we need to plug 4 into f(x) and the result will be our answer. We know that f(x) is

. Plugging in 4 we get

. Therefore, f(4)=41. Hope this helps!
Answer:
The second oneis your answer.
Answer:
k = -2
Step-by-step explanation:
If 
Then

So

From this follows k = -2
Answer:
Right a ratio with three terms in simplest form we've already looked at writing ratios with two terms in simplest form to do that we would change the ratio to a fraction and reduce.