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Pachacha [2.7K]
2 years ago
11

-0.4(x+3)=4 answer this problem

Mathematics
2 answers:
ivann1987 [24]2 years ago
4 0

Answer: 2/1

Step-by-step explanation:

Sauron [17]2 years ago
3 0

Answer:

x = - 13

Step-by-step explanation:

- 0.4(x + 3) = 4 ( divide both sides by - 0.4 )

x + 3 = - 10 ( subtract 3 from both sides )

x = - 13

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Answer:   (0.25,0.33)

Step-by-step explanation:

A 99% confidence interval for population proportion is given by:-

\hat{p}\pm 2.576\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}, where \hat{p} = sample proportion, n = sample size.

Given: n=1025, \hat{p}=0.29

A 99% confidence interval estimate of the proportion of adults who use the Internet for shopping:

0.29\pm 2.576\sqrt{\dfrac{0.29(1-0.29)}{1025}}\\\\=0.29\pm 2.576\sqrt{0.00020087804878}\\\\=0.29\pm2.576(0.01417)\\\\=0.29\pm0.03650192\\\\=(0.29-0.03650192,\ 0.29+0.03650192)\\\\=(0.25349808,\ 0.32650192)

\approx(0.25,\ 0.33)

Thus, a 99% confidence interval estimate of the proportion of adults who use the Internet for shopping = (0.25,0.33)

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