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Komok [63]
3 years ago
14

| 18 - (-13) | it’s subtracting integers

Mathematics
1 answer:
Anna35 [415]3 years ago
7 0
Answer: 31

How: If there are two negative signs like this, you would connect them together and make it into a addition sign where you then can add them.
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Answer:

The values are calculated with the help of table.

Step-by-step explanation:

We are given the following information in the question:

A table is shown showing trees on two different plots of land which are tested for disease.

    Tree:        1           2           3           4          5           6          7        

     Plot:         A          A           B           B         B           A          B

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We have to find:

Calculating from the table, we can fill the values as:

                                             Plot A                Plot B

Disease Present                        1                          3

Disease not Present                2                          1

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