Mathematics: Pls help me I have to do my other work. Also this detects if it’s right or wrong:(

Pls help me I have to do my other work. Also this

Ответ:

wdgyvwyv8840

08.02.2022

Mathematics

The first box is 10
Second box is 70
Third box is 120
He bought 5

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Ответ:

Gb728888

30.11.2021

Mathematics

To add two matrices, we just add the numbers in the matching positions:
[1]+[-2]=[-1]
[-4]+[6]=[2]
[3]+[-2]=[1]
[5]+[4]=[9]
So, this leaves us with the final matrix of
[-1 2]
[1 9]

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Pls help me I have to do my other work. Also this detects if it’s right or wrong:(

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