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blondinia [14]
3 years ago
7

Andy sells homemade loaves of bread. He offers a discount to customers who purchase more than one loaf. The expression below rep

resents the average cost per loaf. 4+(x−1)x
Mathematics
2 answers:
Leokris [45]3 years ago
8 0
Number of discount loaves :(x-1)
Total cost: 4+(x-1)
<span>Total Number of Loaves: (x)</span>
vivado [14]3 years ago
6 0

Answer:

The expression is

\frac{4+(x-1)}{x}

To solve this question, we just need to identify each part of the expression.

In the expression x represents the number of loaf, 4+(x-1) represents the cost, and x-1 represents the discount.

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Answer:

1.) There is a focus at (0,4)

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Step-by-step explanation:

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Step-by-step explanation:

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3 years ago
A survey of 85 families showed that 36 owned at least one DVD player. Find the 99% confidence interval estimate of the true prop
attashe74 [19]

Answer:

0.424 - 2.58\sqrt{\frac{0.424(1-0.424)}{85}}=0.286

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Step-by-step explanation:

Information given:

X= 36 represent the families owned at least one DVD player

n= 85 represent the total number of families

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In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 99% of confidence, our significance level would be given by \alpha=1-0.99=0.01 and \alpha/2 =0.05. And the critical value would be given by:

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The confidence interval for the mean is given by the following formula:  

\hat p \pm z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}

If we replace the values obtained we got:

0.424 - 2.58\sqrt{\frac{0.424(1-0.424)}{85}}=0.286

0.424 + 2.58\sqrt{\frac{0.424(1-0.424)}{85}}=0.562

The 99% confidence interval would be given by (0.286;0.562)

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3 years ago
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Step-by-step explanation:

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