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ludmilkaskok [199]
2 years ago
11

How to put (x+1)(x+1)(x-1) in standard form

Mathematics
1 answer:
Ludmilka [50]2 years ago
5 0
Hello! And thank you for your question.

All you are going to do is use the formula for the standard form.

Ax + By = C

Final Answer:

x³ + x² - x - 1
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Write an expression of: divide B by 6, then subtract 3 from the result do not simplify any part of the expression
IrinaVladis [17]

Answer:(4-6)-h

Step-by-step explanation:

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Step-by-step explanation:

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2 years ago
At a local university, a sample of 49 evening students was selected in order to determine whether the average age of the evening
pav-90 [236]

Answer:

z=\frac{23-21}{\frac{3.5}{\sqrt{49}}}=4    

p_v =2*P(z>4)=0.0000633  

When we compare the significance level \alpha=0.1 we see that p_v so we can reject the null hypothesis at 10% of significance. So the  the true mean is difference from 21 at this significance level.

Step-by-step explanation:

Data given and notation  

\bar X=23 represent the sample mean

\sigma=3.5 represent the population standard deviation

n=49 sample size  

\mu_o =21 represent the value that we want to test

\alpha=0.1 represent the significance level for the hypothesis test.  

z would represent the statistic (variable of interest)  

p_v represent the p value for the test (variable of interest)  

State the null and alternative hypotheses.  

We need to conduct a hypothesis in order to check if the average age of the evening students is significantly different from 21, the system of hypothesis would be:  

Null hypothesis:\mu = 21  

Alternative hypothesis:\mu \neq 21  

The statistic is given by:

z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}}  (1)  

Calculate the statistic

We can replace in formula (1) the info given like this:  

z=\frac{23-21}{\frac{3.5}{\sqrt{49}}}=4    

P-value

Since is a two sided test the p value would be:  

p_v =2*P(z>4)=0.0000633  

Conclusion  

When we compare the significance level \alpha=0.1 we see that p_v so we can reject the null hypothesis at 10% of significance. So the  the true mean is difference from 21 at this significance level.

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2 years ago
Which value of x is in the solution set of the following inequality -3×+5&gt;17
Sholpan [36]

Answer:

x < -4

Step-by-step explanation:

To solve the inequality, use inverse operations.

-3x + 5 > 17

-3x > 17 - 5                    Subtract 5 from both sides.

-3x > 12                         Divide both sides by -3.

x < -4                             Flip the inequality sign since you divided by a negative.

5 0
3 years ago
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