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kirill115 [55]
3 years ago
6

31. Dorothy buys her groceries online. The total cost that Dorothy pays is the sum of the

Mathematics
1 answer:
raketka [301]3 years ago
5 0

Answer:

D) R = x + 6.1

Step-by-step explanation:

Let x represent groceries

R represents the total cost

Total cost = cost of groceries + flat rate shipping fee

R = x + 6.1

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-7 = 7d - 8

Add 8 to both sides.

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Divide both sides by 7.

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tigry1 [53]

Answer:

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Step-by-step explanation:

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How many 2-digit numbers can be formed using only the digits 2, 3, 5 and 6, if the numbers are not repeated within a number?
larisa [96]

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8 0
3 years ago
A sample size of n = 64 is drawn from a population whose standard deviation is o = 5.6.
AlekseyPX

Answer:

The margin of error for a 99% confidence interval for the population mean is 1.8025.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.99}{2} = 0.005

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

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The margin of error for a 99% confidence interval for the population mean is 1.8025.

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Answer:

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