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Ksju [112]
3 years ago
11

Solve for the roots: x3-2x2+3x-6

Mathematics
2 answers:
Levart [38]3 years ago
7 0

x^3 - 2x^2+ 3x - 6 = 0

Hint: Solve by grouping.

forsale [732]3 years ago
4 0

Answer:

x = 2, i\sqrt[]{3},  -i \sqrt{3}

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A manufacturing company produces steel housings for electrical equipment. The main component part of the housing is a steel trou
Mrrafil [7]

Answer:

Check the explanation

Step-by-step explanation:

(a)

H0: Population mean = 8.46

H1: Population mean is not equal to 8.46

The test statistic (t) is given by the following expression -

{t=\frac{\overline{x}-\mu_0}{s/\sqrt{n}}}

We have calculated the sample mean (8.421) and sample standard deviation (0.0461). Therefore, the test statistic (t) will be -

t = (8.421 - 8.46)/(0.0461/sqrt(49)) = -5.92

The left-sided critical value from t-distribution (two-tailed) is -2.01. Thus the test statistic falls in the rejection region and we reject the null hypothesis at 95% confidence level and conclude that the population mean is different from 8.46 inches.

(b)

There are the following four assumptions for a single sample t-test.

The observations are in ratio scale.

The observations have been taken in such a manner that every single observation is independent and uncorrelated from the others.

There should not be any significant outliers in the sample observations.

The sample data should be approximately normal.

(c)

The first assumption is true as the data is in inches. The second assumption cannot be tested now. It will depend upon the situation and study design which we assume as correct in this case. The third assumption is checked by plotting a box plot and finding the outliers. The final assumption can be checked using the Anderson-Darling normality test.

Kindly check the graphical table in the attached images below.

(d)

The data is normal (the p-value of Anderson-Darling test in > 0.05). However, two points in the Box plot are outliers though not grossly different from the entire sample data set. So, we conclude that the assumptions are valid in this case for conducting the t-test.

7 0
3 years ago
Determine which ordered pair is a solution of Y equals 8X
Alchen [17]
The line y = 8x passes through the origin, which is the point (0, 0).

We say the ordered pair (0, 0) lies on the graph y = 8x.
5 0
3 years ago
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What does 7^x=21 in a logarithmic equation
Leviafan [203]
Loga x=n ⇔ a^n=x
log₇ 21=x

x=log ₇ 21
x=ln 21 / ln7=1.564575034...

Answer: x=log₇ 21
8 0
3 years ago
Help please need help <br>​
alexandr402 [8]

Answer:

sorry I'm too nood for that

3 0
3 years ago
Consider the data points (–4, –14), (–2, –7), (0, –3), (2, –2), and (6, –6). Which type of function would best model the data se
Lunna [17]

The solution is attached as a word file

Download doc
3 0
3 years ago
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