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3 years ago

-9 - (-4) = What does that equal to?

Mathematics

1 answer:

CaHeK987 [17]3 years ago

5 0

Answer:

-5

Step-by-step explanation:

When you subtract a negative you end up adding it instead

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P divided by 1 2/3 = 2 1/5

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Find a function that models the area A of an equilateral triangle in terms of the length x of one of its sides.

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$A(x)=\frac{x^2\sqrt3}{4}$

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3 years ago

Find the equation of the line that passes through the given points. (1, 4.5) and (3, 6)

Zanzabum

Answer:

y=0.75x+3.75

Step-by-step explanation:

The slope is

$\frac{6 - 4.5}{3 - 1} = \frac{3}{4}$

Substituting into point-slope form,

y - 6 = 0.75(x - 3)

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2 years ago

When we rewrite a fraction as a decimal, are we changing the value of the fraction? hi so my teacher is asking this question on

AnnyKZ [126]

Answer:

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Step-by-step explanation:

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2 years ago

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Jason inherited a piece of land from his great-uncle. Owners in the area claim that there is a 45% chance that the land has oil.

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 $P(A) = 0.45$

He buys a kit that claims to have an 80% accuracy rate of indicating oil in the soil.

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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2 years ago