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3 years ago

9

B) Given y= 5x – 4, enter the value of x when y = –39

2 answers:

Genrish500 [490]3 years ago

6 0

X=-7
Substitute-39 where y is seen in the question this will result in the following
-39=5x-4
Then you need to isolate 5x you do this by doing the opposite and removing the 4 so you would instead add 4 resulting in
-35=5x
To finish the question you would again aim to isolate x by dividing by 5 this would leave you with the end result of
X=-7
Below is all of the work together remember that you do to one side you do to the other
-39=5x-4
+4 +4
-35=5x
/5 /5
-7=5

Serggg [28]3 years ago

3 0

Answer:

try using 7 for your anwser i hope this helps

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.

45% chance that the land has oil.

This means that $P(A) = 0.45$

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This means that $P(B|A) = 0.8$

What is the probability that the land has oil and the test predicts it?

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

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

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

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

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