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nekit [7.7K]
2 years ago
5

Eight less than a number is 19 __________

Mathematics
2 answers:
natali 33 [55]2 years ago
8 0
In this case x is 27. Because 27-8=19 hope that help
OlgaM077 [116]2 years ago
6 0

Answer:

x - 8 = 19

Step-by-step explanation:

in this case x is 27. because 27 - 8 = 19

hope this is what u needed!

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In a random sample of 26 residents of the state of Montana, the mean waste recycled per person per day was 2.8 pounds with a sta
Rainbow [258]

Answer:

The critical value that should be used in constructing the confidence interval is T = 1.316.

The 80% confidence interval for the mean waste recycled per person per day for the population of Montana is between 2.741 pounds and 2.859 pounds.

Step-by-step explanation:

We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 26 - 1 = 25

80% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 25 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.8}{2} = 0.9. So we have T = 1.316

The critical value that should be used in constructing the confidence interval is T = 1.316.

The margin of error is:

M = T\frac{s}{\sqrt{n}} = 1.316\frac{0.23}{\sqrt{26}} = 0.059

In which s is the standard deviation of the sample and n is the size of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 2.8 - 0.059 = 2.741 pounds

The upper end of the interval is the sample mean added to M. So it is 2.8 + 0.059 = 2.859 pounds.

The 80% confidence interval for the mean waste recycled per person per day for the population of Montana is between 2.741 pounds and 2.859 pounds.

4 0
2 years ago
You have $7.45. You buy 8 items that cost $0.83 each. How much money do you have left
Agata [3.3K]

Answer:

$0.81

Step-by-step explanation:

left

7.45-8(0.83)=7.45-6.64=0.81

I hope I have helped you

6 0
2 years ago
Which equation represents a line which is perpendicular to the y-axis?
erma4kov [3.2K]

Answer:

y = 5

Step-by-step explanation:

The y-axis and any lines that are parallel to it are vertical. Therefore, a line that would be perpendicular to the y-axis would need to be horizontal. All horizontal lines have a slope equal to 0 and are represented by the equation y = a constant, or a single number with no variables.  

The only option that follows that format is y = 5, thus that is the answer.  

6 0
2 years ago
What is the range for the amount of hours studied?<br><br><br> 6<br> 18<br> 4<br> 12
Ne4ueva [31]

Answer:

6

Step-by-step explanation:

You take the most amount studied (18) and the least amount studied (12) and subtract them and that would be the range

5 0
3 years ago
What is 20+10+40000+33450 ?
kenny6666 [7]

Answer:

73480

Step-by-step explanation:

Addition by place value

6 0
3 years ago
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