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ddd [48]
2 years ago
13

Find two numbers with a sum of 20 and a difference of 14.

Mathematics
1 answer:
vivado [14]2 years ago
4 0
A and B Definitely. 3 and 17, -3 and -17
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web based software company is interested in estimating the proportion of individuals who use the Firefox browser. In a sample of
nata0808 [166]
<h2>Answer with explanation:</h2>

Let \hat{p} denotes the sample proportion.

As per given , we have

n= 200

\hat{p}=\dfrac{30}{200}=0.15

Critical value for 99% confidence : z_{\alpha/2}=2.576

Confidence interval for population proportion :-

\hat{p}\pm z_{\alpha/2} \sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}\\\\=0.15\pm (2.576)(\sqrt{\dfrac{0.15(1-0.15)}{200}})\\\\\approx0.15\pm0.065\\\\=(0.15-0.065,\ 0.15+0.065)\\\\=(0.085,\ 0.215)

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The lower limit on the 99% confidence interval = 0.085

6 0
3 years ago
Find.................
natka813 [3]
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3 years ago
Help me with this please
tatyana61 [14]

Step-by-step explanation:

5x - 5° = 40° ( being vertically opposite angles)

5x = 40° + 5°

5x = 45°

x = 45°/ 5

x = 9°

Now

< 1 = 5 * 9° - 5 = 45° - 5° = 40°

Hope it will help :)

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