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Ivanshal [37]
3 years ago
14

Which expression is equivalent to a+(c+7)

Mathematics
2 answers:
Kobotan [32]3 years ago
8 0
The last option or d is the correct answer because that is a property that will work if you need help message me
salantis [7]3 years ago
5 0
The last option, (a+c) + 7 is equivalent
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Please help guys thank you!
alexdok [17]
On all three questions?
4 0
3 years ago
What is the opposite of the opposite of the opposite of 29?​
Bond [772]

Answer:

-29

Step-by-step explanation:

First opposite: -29

Second opposite: 29

Third opposite: -29

3 0
3 years ago
At the farmers’ market, two pounds of peaches cost $4.20. How much will five pounds cost?
djyliett [7]
Each pound of peachs costs $2.10.
($4.20 ÷ 2)

Therefore five pounds of peaches would be $10.50.
($2.10 × 5)

8 0
3 years ago
Read 2 more answers
Maximize the objective function P = 3x + 5y for the given constraints
Nikitich [7]
The answer is 19 please like and 5 star
7 0
3 years ago
Researchers are studying the distribution of subscribers to a certain streaming service in different populations. From a random
Katen [24]

Answer:

CI = (0.17 - 0.27)\± 1.65\sqrt{\frac{(0.17)*(0.83) + (0.27)*(0.73)}{200}}

Step-by-step explanation:

Given

n = 200

x_1 = 34 -- City C

x_2 = 54 --- City K

Required

Determine the 90% confidence interval

This is calculated using:

CI = \bar x \± z\frac{\sigma}{\sqrt n}

Calculating \bar x

\bar x = \bar x_1 - \bar x_2

\bar x = \frac{x_1}{n} - \frac{x_2}{n}

\bar x = \frac{34}{200} - \frac{54}{200}

\bar x = 0.17 - 0.27

For a 90% confidence level, the ​z-score is 1.65.  So:

z = 1.65

Calculating the standard deviation \sigma

\sigma = \sqrt{(\bar x_1)*(1 - \bar x_1) + (\bar x_2)*(1 - \bar x_2) }

So:

\sigma = \sqrt{(0.17)*(1 - 0.17) + (0.27)*(1 - 0.27) }

\sigma = \sqrt{(0.17)*(0.83) + (0.27)*(0.73)}

So:

CI = (0.17 - 0.27)\± 1.65\frac{\sqrt{(0.17)*(0.83) + (0.27)*(0.73)}}{\sqrt {200}}

CI = (0.17 - 0.27)\± 1.65\sqrt{\frac{(0.17)*(0.83) + (0.27)*(0.73)}{200}}

7 0
2 years ago
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