All categories

3 years ago

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

You might be interested in

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