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3 years ago

find the value of this integer expression: -2 (+3+-4+-8++7), calculation with distribution and calculation without distribution

Mathematics

1 answer:

Sergeu [11.5K]3 years ago

6 0

Answer:

With distribution

-2(3) + -2(-4) + -2(-8) + -2(7)

= -6 + 8 + 16 - 14

= 4

Without distribution

-2 (3 -4 -8 + 7)

= -2 (-2)

= 4

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Find the value of ln(-7).

const2013 [10]

Answer:

Step-by-step explanation:

Here, we want to find the value of ln (-7)

ln is same as Log to base e and mathematically , we have it for positive numbers only

For that of negative numbers, we get undefined results

However, by the use of special mathematical

methods, we have the answer for ln (-7) as;

1.94591015 + 3.14159265 i

As we can see, for the second part, the value for the coefficient of the complex number is pi and thus, we have the correct option as A

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3 years ago

in a population distribution a score of x=28 corresponds to z=-1.00 and a score of x=34 what is the mean and standard deviation

irakobra [83]

$x=28\implies z=\dfrac{28-\mu}\sigma\implies \mu-\sigma=28$

$x=34\implies z=\dfrac{34-\mu}\sigma\implies \mu+\sigma z=34$

We need the exact value of $z$ to find a proper solution, but a general one can still be found. Subtracting the first equation from the second gives

$(\mu+\sigma z)-(\mu-\sigma)=34-28\implies (z+1)\sigma=6\implies \sigma=\dfrac6{z+1}$

Plug this into either equation and you get

$\mu-\dfrac6{z+1}=28\implies \mu=28+\dfrac6{z+1}$

(It's guaranteed that $z\neq-1$ in this case because that already corresponds to $x=28$ .)

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4 years ago

What is the reciprocal of 2 1/2?

Yuki888 [10]

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3 years ago

Find the volume of the cone.

ololo11 [35]

Answer:

Step-by-step explanation:

volume=1/3 πr²h

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3 years ago

Compute the geometric mean for the following data on growth factors of an investment for 10 years.

Brrunno [24]

The geometric mean for the above set of data given is: 1.1475 (Option B). See the explanation below.

<h3>What is Geometric Mean?</h3>

The geometric mean can be defined as the average rate of return of a set of values obtained by multiplying the terms together.

Geometric mean is best suited for series with serial correlation, which is notably true for investment portfolios.

<h3>What is the computation justifying the above answer?
</h3>

The formula for geometric mean is given as:

$\left(\prod _{i=1}^{n}x_{i}\right)^{\frac {1}{n}}={\sqrt[{n}]{x_{1}x_{2}\cdots x_{n}}}$

Hence,

The geometric Mean =

1.0147506490423

$\approx$ 1.1475

Learn more about Geometric Mean:
brainly.com/question/23706022
#SPJ4

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2 years ago

find the value of this integer expression: -2 (+3+-4+-8++7), calculation with distribution and calculation without distribution​

find the value of this integer expression: -2 (+3+-4+-8++7), calculation with distribution and calculation without distribution