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Korvikt [17]
3 years ago
9

john has 8 pencils. tim has 2 less pencils than john. which expression shows how many pencils tim has?

Mathematics
2 answers:
Misha Larkins [42]3 years ago
7 0

Answer:

B

Step-by-step explanation:

cuz i said

enot [183]3 years ago
4 0

Answer:

b

Step-by-step explanation:

8-2 would be the amount of pencils tim has

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A statistician chooses 27 randomly selected dates, and when examining the occupancy records of a particular motel for those date
Anni [7]

Answer:

Confidence interval variance [21.297 ; 64.493]

Confidence interval standard deviation;

4.615, 8.031

Step-by-step explanation:

Given :

Variance, s² = 34.34

Standard deviation, s = 5.86

Sample size, n = 27

Degree of freedom, df = 27 - 1 = 26

Using the relation for the confidence interval :

[s²(n - 1) / X²α/2, n-1] ; [s²(n - 1) / X²1-α/2, n-1]

From the chi distribition table :

X²α/2, n-1 = 41.923 ; X²1-α/2, n-1 = 13.844

Hence,

[34.34*26 / 41.923] ; [34.34*26 / 13.844]

[21.297 ; 64.493]

The 95% confidence interval for the population variance is :

21.297 < σ² < 64.493

Standard deviation is the square root of variance, hence,

The 95% confidence interval for the population standard deviation is :

4.615 < σ < 8.031

3 0
3 years ago
A dog walks at a speed of 3mi/hr for 2 hours. How far (distance) did the dog walk? *​
Nikolay [14]

Answer:

6 miles

Step-by-step explanation:

After one hour the dog will have walked three miles after two hours the dog will have walked three more miles for a total of 6 miles.

6 0
3 years ago
You put the names of all the students in your class in a paper bag. There are 16 boys and 18 girls. If you draw a name at random
yaroslaw [1]
It would be a. 8/9 because for every 8/9 boy, there is 1 girl. To check this work, you can do 8/9 x 18 which equals 16.
5 0
3 years ago
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joja [24]

Answer:

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Step-by-step explanation:

3 0
3 years ago
Marissa bought 12.8 pounds of potatoes at $1.35 per pound how much did Marissa spend for the potatoes? Explain.
Yuri [45]
17.28

1.35 x 12.8 = 17.28
5 0
1 year ago
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