Select all the statements that describe the expression 5+2x.

Mathematics

1 answer:

ivanzaharov [21]3 years ago

5 0

Answer:

The expression represents the sum of 5 and 2x.
The expression represents 5 plus x plus x.
The expression represents 5 plus 2 times x.

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yaroslaw [1]

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avanturin [10]

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We are 95% confident that the true proportion of TV audience is between 65.15% and 65.85%

Step-by-step explanation:

-From the given information, $\hat p=0.65$ .

-We calculate the confidence interval using this value at 95% confidence level:

$CI=\hat p\pm z \sqrt{\frac{\hat p(1-\hat p)}{n}}\\\\\\=0.65\pm 1.96\times \sqrt{\frac{0.65\times 0.35}{12000}}\\\\\\=0.65\pm 0.0085\\\\\\=[0.6415,0.6585]$