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Brrunno [24]
3 years ago
5

Add -2 + (-7) = what is the answer

Mathematics
2 answers:
lina2011 [118]3 years ago
6 0

Answer: -9

Step-by-step explanation: 2 + 7 = 9 and just put an negative in front of 9

<h2>-9 -_-</h2>

krek1111 [17]3 years ago
4 0

Answer:

-2+(-7) is the question

-2-7             + and - together makes -

-9                you add when the numbers have a sign of  - and -

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Ciara, an ornithologist, has 444 bird feeders at separate locations. She wonders if birds are equally likely to visit each of th
dybincka [34]

The expected count of visits is the mean or average visits to each feeder

The expected count of visits to the third feeder is 87.5

<h3>How to determine the expected count of visit?</h3>

The table of values is given as:

Feeder                 1   2    3   4

Observed visits 80 90 92 88

In this case, the null hypothesis implies that the visits to each feeder are uniformly distributed

So, the expected count is calculated using:

Expected count =Visits/Feeders

This gives

Expected count = 350/4

Evaluate the quotient

Expected count = 87.50

Hence, the expected count of visits to the third feeder is 87.5

Read more about chi square goodness of fit test at:

brainly.com/question/4543358

7 0
2 years ago
The value of X is ...
Alex787 [66]

Step-by-step explanation:

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4 years ago
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A donkey weighs 570 pounds and an elephant weighs 5 tons. How much more does the elephant weigh?
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A ton is equivalent to 1000 pounds so:
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