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ANTONII [103]
3 years ago
10

Whats (8x+10) please help me T-T

Mathematics
1 answer:
jekas [21]3 years ago
6 0

Answer:

18x

Step-by-step explanation:

8·x=8x+10=18x

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A 99% confidence interval (in inches) for the mean height of a population is 65.7 < μ < 67.3. This result is based on a sa
Wittaler [7]

Answer:

66.5 -1.976* 0.3065= 65.89

66.5 +1.976* 0.3065= 67.11

And the 95% confidence interval would be givne by (65.89; 67.11)

Step-by-step explanation:

For this case we have a 99% confidence interval for the true mean hegiht givne by:

65.7 \leq \mu \leq 67.3

And we can begin finding the mean with this formula:

\bar X= \frac{65.7 +67.3}{2}= 66.5

Now we can estimate the margin of error:

ME = \frac{67.3-65.7}{2}= 0.8

The sample size for this case is n = 144 then the degrees of freedom are given by:

df = n-1= 144-1=143

And then we can find a critical value for a 99% of confidence and 143 degrees of freedom using a significance level of 0.01 and we got:

t_{\alpha/2}= 2.61

Then the standard error is given by:

SE = \frac{ME}{t_{\alpha/2}}= \frac{0.8}{2.61}= 0.3065

Now we can find the other critical value for 95% of confidence and we got:

t_{\alpha/2}= 1.976

And the new confidence interval would be given by:

66.5 -1.976* 0.3065= 65.89

66.5 +1.976* 0.3065= 67.11

And the 95% confidence interval would be givne by (65.89; 67.11)

3 0
3 years ago
A submarine is 984.6 feet BELOW Sea Level. It dives down another 122.4 feet. What is the elevation of the submarine after the di
ratelena [41]

Answer:

1107 feets below sea level

Step-by-step explanation:

Given that :

Initial elevation of submarine = 984.6 feets below sea level

Depth of dive from initial elevation = 122.4 feets below sea level

The elevation after the dive :

Initial elevation + depth of dive

984.6 + 122.4

= 1107 feets below sea level

4 0
3 years ago
Solve |x|=11 <br> A. {-11} <br> B. {11} <br> C. {-11, 11}
Deffense [45]

Answer:

the answe is 11

Step-by-step explanation:


7 0
4 years ago
Read 2 more answers
£750 is divided between Bridget, Caroline &amp; Sarah so that Bridget gets twice as much as Caroline, and Caroline gets three ti
Sladkaya [172]

Answer: £225

Step-by-step explanation:

Let Sarah's amount be represented by x.

Since Caroline gets three times as much as Sarah, Caroline will get: 3x

Bridget gets twice as much as Caroline, therefore Bridget will get: 2 × 3x = 6x

Sarah = x

Caroline = 3x

Bridget = 6x

Total = x + 3x + 6x = 10x

Caroline's faction is 3/10. We then multiply the fraction by £750. This will be:

= 3/10 × £750

= 0.3 × £750

= £225

Caroline will get £225

4 0
4 years ago
steven has a rectangular rug with a perimeter of 16 feet the width of the rug is 5 feet what is the length of the rug
Travka [436]

-- "Perimeter" means all the way around, all four sides.

-- That's two lengths and two widths.

-- So one length and one width is half of the perimeter.

-- If the perimeter is 16-ft, then one length + one width is 8-ft.

-- If the width is 5-ft, then the length is (8 - 5) = 3-ft.
 
4 0
4 years ago
Read 2 more answers
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