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Llana [10]
2 years ago
5

I need help !

\sqrt{15}" alt="3\sqrt{5} +5\sqrt{15}" align="absmiddle" class="latex-formula">
Mathematics
1 answer:
Feliz [49]2 years ago
6 0

Answer:

26

Step-by-step explanation:

SORRY IF IM WRONG

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;-<br>y=3-2x<br>4x+2y=10 <br><br>what is the answer​
pentagon [3]
4x+2(3-2x)=10, 4x+6-4x=10, x+6=10, x=4
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3 years ago
When the point (-3,2) is reflected across the y-axis, what are the coordinates of the resulting point?
Elanso [62]
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a previous analysis of paper boxes showed that the standard deviation of the length is 9mm. What is the 98% confidence interval
il63 [147K]
We cannot calculate the confidence interval without the sample size.  However, for the second question, the sample size needed would be 49.

The formula we use is

n=(\frac{z_{\frac{\alpha}{2}}\times \sigma}{E})^2

To find the z-score:
Convert 98% to a decimal:  0.98
Subtract from 1:  1-0.98 = 0.02
Divide by 2:  0.02/2 = 0.01
Subtract from 1:  1-0.01 = 0.99

Using a z-table (http://www.z-table.com) we see that this value is closest to a z-score of 2.33.

Using the z-score, our standard deviation (9) and our margin of error (3), we have:
n=(\frac{2.33(9)}{3})^2=(6.99)^2=48.86\approx 49
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3 years ago
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IRISSAK [1]

Step-by-step explanation:

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tan A = 12/16 = 3/4

sin A = 12/20 = 3/5

4 0
3 years ago
Which is the smallest?
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i think is B

Step-by-step explanation:

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