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3 years ago

Help plz:)))I’ll mark u Brainliest

Mathematics

1 answer:

zheka24 [161]3 years ago

3 0

Answer: The answer is 10

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In a sample of 700 gas stations, the mean price for regular gasoline at the pump was $2.894 per gallon and the standard deviati

frez [133]

Answer:

$P(x < 2.892) = 4.36\%$

Step-by-step explanation:

Given

$N = 700$ --- Population

$\mu = 2.894$ -- Mean

$\sigma = 0.009$ --- Standard deviation

$n = 55$ -- Sample

Required: $P(x < 2.892)$

This question will be solved using the finite correction factor

First, calculated the z score

$z = \frac{x - \mu}{\sqrt{\frac{N -n}{N -1}} * \frac{\sigma}{\sqrt n}}$

$z = \frac{2.892 - 2.894}{\sqrt{\frac{700 -55}{700 -1}} * \frac{0.009}{\sqrt {55}}}$

$z = \frac{-0.002}{\sqrt{\frac{645}{699}} * \frac{0.009}{7.42}}$

$z = \frac{-0.002}{\sqrt{0.92} * \frac{0.009}{7.42}}$

$z = \frac{-0.002}{0.95917 * 0.0012129}$

$z = -1.71$

So:

$P(x < 2.892) = P(z < -1.71)$

Using z table

$P(x < 2.892) = 0.043633$

$P(x < 2.892) = 4.36\%$

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3 years ago

Which expression is equivalent to7(a+2)

Vanyuwa [196]

Answer:

7a + 14

just multiply 7 by both a and 2

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3 years ago

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4√(-81)+6√(-36)<br> (simplify your answer))

Lapatulllka [165]

When looking at expressions like this,, you need to remember that the square root of a negative number does not exist in the set of Real Numbers. This means that there is no way to simplify this expression,, making the correct answer to your question Undefined.
Let me know if you have any further questions.
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3 years ago

If f(x) = -3x - 5 and g(x) = 4x - 2, find (f - g)(x).

ratelena [41]

Answer:

A. (f-g)(x) = -7x -3

Step-by-step explanation:

(f -g)(x) = f(x) -g(x) = (-3x -5) -(4x -2)

= -3x -5 -4x +2

= -3x -4x -5 +2

(f -g)(x) = -7x -3

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2 years ago

Please help me with this question thank you

Fantom [35]

If the answer is an equation then it is:
x=(4y+15)/(5-3y)

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3 years ago

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