1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
UkoKoshka [18]
3 years ago
13

What is the factored form of x^3-1

Mathematics
1 answer:
polet [3.4K]3 years ago
7 0

Answer:

the factors of x^3-1 are x^3 -1 = (x-1) (x^2 +x+1)\\

Step-by-step explanation:

We need to find factors of x^3 -1

x^3-1 \\(x)^3 -(1)^3\\We \,\, know\,\, a^3 -b^3 = (a-b) (a^2 +ab + y^2) \\So, \,\, using\,\, the \,\, formula\,\,\\Here\,\, a= x \,\,and\,\, b= 1\\(x)^3 -(1)^3 = (x-1) (x^2 +x+1)\\

So, the factors of x^3-1 are x^3 -1 = (x-1) (x^2 +x+1)\\

You might be interested in
Two trains leave stations 228 miles apart at the same time and travel toward each other. One train travels at 105 miles per hour
Anastaziya [24]

Answer:

in 20 kilometers round they will meet

3 0
3 years ago
Vitamin D, whether ingested as a dietary supplement or produced naturally when sunlight falls on the skin, is essential for stro
tigry1 [53]

Answer:

a) The 98% confidence interval would be given (0.182;0.218).

b) We are 98% confident that the true proportion of of England people who are deficient in Vitamin D is between 0.182 and 0.218.

c) If repeated samples were taken and the 98% confidence interval computed for each sample, 98% of the intervals would contain the population proportion.

d) Yes since the confidence interval not contains the value 0.25, we can refute the claim at 2% of significance.

Step-by-step explanation:

Data given and notation  

n=2700 represent the random sample taken    

X represent the people in England who are deficient in Vitamin D

\hat p=0.2 estimated proportion of England people who are deficient in Vitamin D

\alpha=0.02 represent the significance level

Confidence =0.98 or 98%

z would represent the statistic (variable of interest)    

p= population proportion of England people who are deficient in Vitamin D

Part a

The confidence interval would be given by this formula

\hat p \pm z_{\alpha/2} \sqrt{\frac{\hat p(1-\hat p)}{n}}

For the 98% confidence interval the value of \alpha=1-0.98=0.02 and \alpha/2=0.01, with that value we can find the quantile required for the interval in the normal standard distribution.

z_{\alpha/2}=2.33

And replacing into the confidence interval formula we got:

0.20 - 2.33 \sqrt{\frac{0.2(1-0.2)}{2700}}=0.182

0.20 + 2.33 \sqrt{\frac{0.2(1-0.2)}{2700}}=0.218

And the 98% confidence interval would be given (0.182;0.218).

Part b

We are 98% confident that the true proportion of of England people who are deficient in Vitamin D is between 0.182 and 0.218.

Part c

If repeated samples were taken and the 98% confidence interval computed for each sample, 98% of the intervals would contain the population proportion.

Part d

Yes since the confidence interval not contains the value 0.25, we can refute the claim at 2% of significance.

3 0
3 years ago
PLS HELP ASAP! GIVING BRAINLIST!
Rus_ich [418]

Answer:

I think it is 8, i did not learn this in school

Step-by-step explanation:

2(3x^2+5)

6x^2+10

7 0
3 years ago
Mikayla withdraws $20 on 4 different days durin the week.Find the total change in her account balance after the withdrawls.
Stells [14]

Wait what did she have in her account? We need to know to answer.

7 0
3 years ago
<img src="https://tex.z-dn.net/?f=x%20%2B%20y%20%20%3D%2014%5C%5C%202x%20%2B%204y%20%3D%2018" id="TexFormula1" title="x + y = 1
alexgriva [62]

Answer:

x = 19, y = -5

Step-by-step explanation:

x + y = 14  => x= 14-y

2x + 4y = 18  => 2(x+2y)=18  => x+2y=9

x+2y=9 => (14 - y) + 2y = 9

14 + y = 9  => y = -5

x + (-5) = 14  => x=19

5 0
2 years ago
Other questions:
  • How many solutions exhaust for the given equation 3(x-2)=22-x
    10·1 answer
  • (5) Blackbeard and Shamus find a treasure chest with $40,000 in coins inside. Blackbeard takes
    10·1 answer
  • Is 8/10 greater than 1/2
    8·2 answers
  • BRAINLIEST!!PLEASE HELP ME
    10·1 answer
  • There are 8 squares. If 25 percent of the squares are red and the rest of them are blue, how many squares are red?
    14·2 answers
  • Barrel A and Barrel B are the same size. Barrel A is filled with a solution that is 12% ethanol. The portion of ethanol in the s
    5·1 answer
  • What are the coordinates of a point called
    15·1 answer
  • A livestock pen is built in the shape of a rectangle
    14·2 answers
  • Yall need help on ILD days yall is stup.<br><br> id fo dat '
    7·2 answers
  • 37 + 3 * ( 15 hundreds / 3 tens)<br><br> 1) 52<br> 2) 90<br> 3) 150<br> 4) 187
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!