HELP IT TIMED PLZ,What is the solution to this system of equations?

This includes evaluate numerica expressions

kkurt [141]

Answer:

1. (29 + 19) ➗ 3

(48) ➗ 3

48➗ 3

There are 16 cards in each pile

Step-by-step explanation:

2. 14 3. 110 4. 71 5. 54 6. 16 7. 23

8. 75 9. 32 10. 22 11. 20 12. 48 13. 53

14. Spit 6 in half to get Melinda's length so the answer is 3

15. No the answer is not the same because you have to minus 18 to 8 (which is in the parenthesis) so the answer is 10. But the other way around you have to add 15 (which is in the parenthesis) plus 5.

I really hope I helped you

6 0

2 years ago

You are given the sample mean and the population standard deviation. Use this information to construct the 90% and 95% confide

Gelneren [198K]

Answer:

The 90% confidence interval would be given by (110.168;117.832)

The 95% confidence interval would be given by (119.393;118.607)

Step-by-step explanation:

Assuming this info:" A random sample of 45 home theater systems has a mean price of $114.00. Assume the population standard deviation is $15.30. Construct a 90% and 95 confidence interval for the population mean".

1) Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

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".

$\bar X=114$ represent the sample mean for the sample

$\mu$ population mean (variable of interest)

s=15.30 represent the sample standard deviation

n=45 represent the sample size

2) 90% confidence interval

The confidence interval for the mean is given by the following formula:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

The degrees of freedom are given by:

$df=n-1=45-1=44$

Since the Confidence is 0.90 or 90%, the value of $\alpha=0.1$ and $\alpha/2 =0.05$ , and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.05,44)".And we see that $t_{\alpha/2}=1.68$

Now we have everything in order to replace into formula (1):

$114-1.68\frac{15.30}{\sqrt{45}}=110.168$

$114+1.68\frac{15.30}{\sqrt{45}}=117.832$

So on this case the 90% confidence interval would be given by (110.168;117.832)

3) 95% confidence interval

Since the Confidence is 0.95 or 95%, the value of $\alpha=0.05$ and $\alpha/2 =0.025$ , and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.025,44)".And we see that $t_{\alpha/2}=2.02$

Now we have everything in order to replace into formula (1):

$114-2.02\frac{15.30}{\sqrt{45}}=119.393$

$114+2.02\frac{15.30}{\sqrt{45}}=118.607$

So on this case the 95% confidence interval would be given by (119.393;118.607)

6 0

3 years ago

Write 8.016 as a mixed number in simplest form.

kolezko [41]

Answer:

1002 / 125

Step-by-step explanation:

4 0

3 years ago

I look at a random time of day at a digital clock that shows times from 1:00 through 12:59. if i ignore the colon, what is the p

Sergio039 [100]

The probability that the digits display a palindrome = 19/240 Ans.

As we know the total no. of possible hours = 12

Total number of possible minutes= 60

Therefore, total no. of possible times that can be shown are = 12

Since total no. of Palindromes possible per hour for the nine hours 1 through 9 = 6

No. of palindromes per hour from 10 through 12 = 1

Therefore, total no of palindromes = (6*9) + 3 = 57

Probability that the digits display a palindrome = 57/720 = 19/240

5 0

4 years ago

Read 2 more answers

The author most strongly suggests that the reason thescientific community initially rejected Higgs’s ideawas that the ideaA) add

Nuetrik [128]

The reason the scientific community initially dismissed Higgs' idea was that it seemed to have little empirical basis. The correct option is d.

Given the passage is shown in the attached images.

The fourth paragraph of the passage explains why Higgs' idea of the Higgs field was initially rejected by the scientific community: “The article has been rejected. Not because it contained a technical error, but because the premise of something invisible that enters space and interacts with particles to provide their mass, well, it all looked like a bunch of exaggerated speculation. In other words, the scientific community was skeptical of Higgs' idea because it appeared to be mere theoretical speculation without any empirical evidence.

Option A is incorrect because the passage makes it clear that Higgs' idea addressed a theoretical problem already recognized by scientists, rather than a problem that has yet to be realized by them.

Option B is incorrect because the fourth paragraph implies that Higgs' work was rigorous (free from "technical errors") and not problematic at the level of their equations.

Option C is incorrect because the passage never indicates that acceptance of the Higgs field has rendered other, earlier theories in physics obsolete.

Therefore, the author strongly suggests that the reason the scientific community initially rejected Higgs' idea from the given passage is that it appeared to have little empirical basis.

Learn more about course of passage from here brainly.com/question/1290055

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7 0

2 years ago

HELP IT TIMED PLZ,What is the solution to this system of equations?​

HELP IT TIMED PLZ,What is the solution to this system of equations?