<u>Complete Question:</u>
If (x + k) is a factor of f(x), which of the following must be true?
- f(k) = 0
- f(–k) = 0
- A root of f(x) is x = k.
- A y intercept of f(x) is x = –k.
<u>Correct Answer:</u>
If (x + k) is a factor of f(x), f(-k)=0 must be true
option B
<u>Step-by-step explanation:</u>
We have , (x + k) is a factor of f(x) . For this case we have a function of the form: . Thus,
x: independent variable
f (x): dependent variable
Since (x + k) is a factor of f (x) then it follows that:
For we have:
⇒
From here, we clear the value of x:
⇒
Then, replacing this value of x in the function, we have:
⇒
Therefore , Correct option B) f (-k) = 0.
Answer:
Step-by-step explanation:
Answer:
the answer is 10% if it is simple interest you're talking about.
Answer:
Katie will have 7 dollars left over.
Step-by-step explanation:
100
She buys a book so subtract 23 from 100.
100-23= 77
Katie has 77 dollars and wants to donate $10 to as much charities. 10 can go into 77, 7 times, which means she can only donate to 7 charities in $10.