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Darya [45]
3 years ago
8

Write the numbers in order from least to greatest. -7, -6.5, -6.2, 0, -4.5

Mathematics
2 answers:
algol133 years ago
7 0

Answer: -7, -6.5, -6.2, -4.5, 0

I hope this helps, stay safe, and have a great rest of your day. :)

erica [24]3 years ago
6 0

Answer:

-7, -6.5, -6.2, -4.5, 0

Step-by-step explanation:

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A researcher is going to estimate the average typing speed of students of a college. He selects a random sample of 20 students a
Stella [2.4K]

Answer:

The margin of error of the 90% confidence interval of a student's average typing speed is of 1.933 wpm.

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 = 20 - 1 = 19

90% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 19 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.9}{2} = 0.95. So we have T = 1.7291

The margin of error is:

M = T\frac{s}{\sqrt{n}}

In which s is the standard deviation of the sample and n is the size of the sample. For this question, we have s = 5, n = 20. So

M = T\frac{s}{\sqrt{n}}

M = 1.7291\frac{5}{\sqrt{20}}

M = 1.933

The margin of error of the 90% confidence interval of a student's average typing speed is of 1.933 wpm.

8 0
3 years ago
Express the series using sigma notation. 2 - 6 + 18 – 54 + 162 ...
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4 0
3 years ago
Using the Addition Method, solve for y in the following system of linear equations: 4x – 2y = 6 2x + y = 7
Lady_Fox [76]

Answer:

y = 2

Step-by-step explanation:

Addition Method:

4x - 2y = 6

2x + y = 7

-2(2x + y) = -2(7)

4x - 2y = 6

-4x - 2y = -14

-4y = -8

y = 2

Substitution Method:

4x - 2y = 6

2x + y = 7

-2y = 6 - 4x

2y = 4x - 6

y = 2x - 3

2x + (2x - 3) = 7

4x - 3 = 7

4x = 10

x = 2.5

2(2.5) + y = 7

5 + y = 7

y = 2

Brainliest, please :)

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2 years ago
If 18,x+15,27 and 2x+7 are in proportion,find the value of x
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Step-by-step explanation:

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7 0
2 years ago
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tresset_1 [31]

Answer:

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Step-by-step explanation:

6 0
3 years ago
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