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yanalaym [24]
3 years ago
8

SOMEONE HELPPP I CANT DO IT

Mathematics
1 answer:
bekas [8.4K]3 years ago
6 0

Answer:

???????

Step-by-step explanation:

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Marla started her school work at 8:48am. If she has to do 4 hours of school, what time will she be off?
grigory [225]

Answer:

See below.

Step-by-step explanation:

Q) 8:48 a.m. + 4 hours

= <u>12:48 p.m.</u>

<u></u>

Bonus Q) 8:56 a.m. + 4 hours

= <u>12:56 p.m.</u>

<u></u>

<u>They will both be off by 12:56 p.m.</u>

<u></u>

8 0
2 years ago
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The sum of 42 fish and x fish is 68 fish. What is the unknown number of fish?
lozanna [386]

Answer:

the unknown number of fish is 26

Step-by-step explanation:

I figured this out by subtracting 68 - 47 = x.

x = 26

7 0
3 years ago
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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
3 years ago
What are the answer to this question
IrinaK [193]

Answer: t=-3h+25

Step-by-step explanation:

t=-3h+25

25 degrees is a constant-- it never changes, no matter how many hours goes by. So, you don't multiply a variable with it.

The temperature drops every 3 hours-- this is not constant, since it's dependent on the number of hours that passes. So, use a variable here. Since the temperature drops every three hours, it's -3, and not 3.

7 0
3 years ago
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Ricardo bought 6 pounds of peanuts at the local wholesaler for $12. His friend Saniya bought 4 pounds of peanuts at the supermar
guapka [62]

Answer:

ricardo

he payed 2 per pound while she payed 2.50

7 0
3 years ago
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