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yanalaym [24]
3 years ago
5

6n-7=-(8n+7) what is the work and answer

Mathematics
1 answer:
Advocard [28]3 years ago
5 0
6n-7=-8n-7
-7=-14n-7
-14=-14n
1=n
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Some ppl might think this is easy
ratelena [41]
Point-slope form: y - 5 = (-1/5)(x - 7)

standard form: x + 5y = 7

slope-intercept form: y = (-1/5)x + (7/5)
***note: (-1/5) = -0.2 and (7/5) = 1.4
8 0
3 years ago
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A sociologist develops a test to measure attitudes towards public transportation, and 27 randomly selected subjects are given th
taurus [48]

Answer:

The margin of error for the 95% confidence interval for the mean score of all such subjects is of 8.45.

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 = 27 - 1 = 26

95% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 26 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.95}{2} = 0.975. So we have T = 2.0518

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.

In this question:

n = 27, s = 21.4. So

M = 2.0518\frac{21.4}{\sqrt{27}}

M = 8.45

The margin of error for the 95% confidence interval for the mean score of all such subjects is of 8.45.

5 0
3 years ago
Is this correct on using the mean , median, mode, and range ?
yaroslaw [1]
I believe so yes this is correct I think
4 0
3 years ago
How much ounces are in 22 grams 0.035x
Daniel [21]

Answer:

0.77 ounces

My apologies if my answer is wrong :)

8 0
3 years ago
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-2a3 - 3a2 + 4a + 6, 2a3 + 5a2 + 7 <br> sum the expression
zavuch27 [327]

Answer:

2a2 + 4a + 7

Step-by-step explanation:

As, - (2a3 - 3a2 + 4a + 6) + (2a3 + 5a2 + 7)

= 2a2 + 4a + 13

5 0
3 years ago
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