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3 years ago

Hich equation can pair with x + 2y = 5 to create an inconsistent system?

Mathematics

2 answers:

sladkih [1.3K]3 years ago

8 0

Answer: 2x+4y=5 on edge

Step-by-step explanation:

Solve for y for all equations and choose the one that would make parallel lines. Since a is the only one with the same slope and different y intercept, it's the only one that would make the lines parallel.

timofeeve [1]3 years ago

7 0

X+ 2y=5
X=5-2y

2x+4y=3
2(5-2y)+4y=3
10-4y+4y=3
10=3

5x+2y=3
5(5-2y) +2y=3
25-10y+2y=3
-8y=-22
Y=-22/-8

Y=2.75

6x+12y=30
6(5-2y)+12y=30
30-12y+12y=30
30=30

3x+4y=8
3(5-2y)+4y=8
15-6y+4y=8
-2y=8-15
-2y=-7
Y= -7/-2
Y= 3.5

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Determine mu Subscript x overbar and sigma Subscript x overbar from the given parameters of the population and the sample size.

pentagon [3]

Answer:

$\bar X= \mu = 25$

$\sigma_{\bar X}= \frac{7}{\sqrt{15}}= 1.807$

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

Solution to the problem

Let X the random variable that represent the variable of interest of a population, and for this case we know the following conditions

Where $\mu=25$ and $\sigma=7$

And for this case we select a sample size of n= 15. and we want to know the distribution for the sample mean $\bar X$ . We can assume that the distribution for $\bar X$ is approximately normal and given by:

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

Asuming that the distribution for X is also approximately normal. So then the parameters are:

$\bar X= \mu = 25$

$\sigma_{\bar X}= \frac{7}{\sqrt{15}}= 1.807$

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3 years ago

25 less than x <br><br> Pls help anyone

konstantin123 [22]

Answer:

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Step-by-step explanation:

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3 years ago

185g in the ratio 2:3

Thepotemich [5.8K]

\\Find total parts:

2 + 3 = 5

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\\Find 3 parts:

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