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ZanzabumX [31]
2 years ago
15

If (x + k) is a factor of f(x), which of the following must be true?

Mathematics
2 answers:
drek231 [11]2 years ago
8 0

Answer:

B. f(-k)=0

Step-by-step explanation:

edge 2020

KIM [24]2 years ago
6 0

Answer:

<h3>f(-k)=0</h3>

Step-by-step explanation:

(x + k) is a factor of f(x)

x+k=0 => <u>x= -k;</u>    <em>-k is a root of f(x)</em>

=> f(-k)=0

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Answer:

0.625 = 62.5% probability that part B works for one year, given that part A works for one year.

Step-by-step explanation:

We use the conditional probability formula to solve this question. It is

P(B|A) = \frac{P(A \cap B)}{P(A)}

In which

P(B|A) is the probability of event B happening, given that A happened.

P(A \cap B) is the probability of both A and B happening.

P(A) is the probability of A happening.

The probability that part A works for one year is 0.8 and the probability that part B works for one year is 0.6.

This means that P(A) = 0.8, P(B) = 0.6

The probability that at least one part works for one year is 0.9.

This means that: P(A \cup B) = 0.9

We also have that:

P(A \cup B) = P(A) + P(B) - P(A \cap B)

So

0.9 = 0.8+0.6 - P(A \cap B)

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P(B|A) = \frac{P(A \cap B)}{P(A)} = \frac{0.5}{0.8} = 0.625

0.625 = 62.5% probability that part B works for one year, given that part A works for one year.

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Answer:

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Step-by-step explanation:

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