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2 years ago

What is the simplified form of the equation (x-1/x-1) x+5/x+1 -x-2/x-1(x+1/x+1)

Mathematics

1 answer:

melomori [17]2 years ago

4 0

Answer:

(We already know that: x -1/x-1 = 1 and x + 1/x + 1 = 1 there is no need of keeping them)

(x-1/x-1) x+5/x+1 -x-2/x-1(x+1/x+1)

= x + 5/x + 1 - x - 2/x - 1

= x²/x + 5/x + x/x - x²/x - 2/x - x/x

= x² + 5 + x - x² - 2 - x

= 5 -2

= 3

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Graph -6x-9y=54 A B C D

ludmilkaskok [199]

Answer:

Step-by-step explanation:

The slope would be -2/3 and the y-intercept is -6

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NARA [144]

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3 years ago

Determine mu subscript x overbarμx and sigma subscript x overbarσx from the given parameters of the population and the sample si

Alex

Answer:

$\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})$

And replacing we got:

$\mu_{\bar X}= 32$

$\sigma_{\bar X} = \frac{77}{\sqrt{23}} =10.06$

Step-by-step explanation:

Previous concepts

The central limit theorem states that "if we have a population with mean μ and standard deviation σ and take sufficiently large random samples from the population with replacement, then the distribution of the sample means will be approximately normally distributed. This will hold true regardless of whether the source population is normal or skewed, provided the sample size is sufficiently large".

Let X the random variable who represents the variable of interest, with the following properties:

$\mu =32,\sigma =77$

We select a sample of n=23 nails.

From the central limit theorem we can approximate that the distribution for the sample mean $\bar X$ is given by:

$\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})$

And replacing we got:

$\mu_{\bar X}= 77$

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3 years ago

In expanded notation, the hexadecimal 74AF16 is (7*4096) + (4*256) + (A*16) + (F*1). When converting from hexadecimal to decimal

Feliz [49]

Answer:

F is assigned the value of 15

$74AF_{16} = 29871_{10}$

Step-by-step explanation:

Hexadecimal number system is base 16 and it contain the following numbers:

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F

A has a value of 10

B has a value of 11

C has a value of 12

D has a value of 13

E has a value of 14

F has a value of 15

By completing the expanded notation:

$(7*4096) + (4*256) + (A * 16) + (F *1)\\= (7*4096) + (4*256) + (10 * 16) + (15 *1)\\= 28672 + 1024 + 160 + 15\\= 29871$

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2 years ago

Select the expression that is NOT equivalent to 35p+25

mixas84 [53]

35p + 25

A) 5(5 + 3p + 4p)
= 25 + 15p + 20p
= 35p + 25

B) 5(15p + 5 + 20p)
= 75p + 25 + 100p
= 175p + 25

C) 5(5 + 7p)
= 35p + 25

D) 5(4p + 3p + 5)
= 20p + 15p + 25
= 35p + 25

So, in conclusion, option B is incorrect because it does not equal to: 35p + 25 whereas all the other options do.

4 0

3 years ago