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3 years ago

The phrase "six less than twice y" can be represented by the algebraic expression.

Mathematics

2 answers:

cluponka [151]3 years ago

6 0

Answer:

six less than twice y is represented by 2y - 6

Naily [24]3 years ago

6 0

The answer is 2y-6 because it’s insinuating that you are taking away 6 from the variable.

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Answer:

Event A = white marble is selected

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p(B) = 5/10 = 1/2

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3 years ago

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3 years ago

The claim is that the proportion of adults who smoked a cigarette in the past week is less than 0.30, and the sample statistics

IrinaK [193]

Answer: 0.84

Step-by-step explanation:

let p be the population proportion of adults who smoked a cigarette in the past week.

As per given , we have

$H_a: p$

Sample size : n= 1491

The sample proportion of adults smoked a cigarette= $\hat{p}=\dfrac{x}{n}=\dfrac{462}{1491}=0.30985915493\approx0.31$

The test statistic for proportion is given by :-

$z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}$

Substitute all the values , we get

$z=\dfrac{0.31-0.30}{\sqrt{\dfrac{0.30(1-0.30)}{1491}}}\\\\=\dfrac{0.01}{\sqrt{0.000141}}\\\\=\dfrac{0.01}{0.011874342087}=0.84261497731\approx0.84$

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3 years ago