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2 years ago

Please answer with clear instructions so that i can apply this to other questions.

Mathematics

1 answer:

PolarNik [594]2 years ago

8 0

Answer:

x= 1 and -4

Step-by-step explanation:

Factor out the common term 2

2(x²+3x-4)=0

Factor x²+3x-4

2(x-1)(x+4)=0

Solve for x

x= 1 and -4

Hope it helps

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Answer:

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Step-by-step explanation:

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3 years ago

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oksian1 [2.3K]

Answer:

0.36 = 36% probability that the land has oil and the test predicts it

Step-by-step explanation:

Conditional Probability

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.

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This is $P(A \cap B)$ . So

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$P(B \cap A) = P(B|A)*P(A) = 0.8*0.45 = 0.36$

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