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Tasya [4]
3 years ago
15

Quick anyone know the answer?

Mathematics
1 answer:
den301095 [7]3 years ago
8 0
The sum of the measures of angles in all quadrangles is 360 °. Therefore:

(25x+1)+(25x-2)+(20x-1)+82=360\\\\70x+80=360\ \ \ |-80\\\\70x=280\ \ \ |:70\\\\x=4

m\angle D=(20x-1)^o\to m\angle D=(20\cdot4-1)^o=79^o\\\\Answer:\ B.\ 79^o

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3 years ago
URGENT HELP<br> Solve for X
suter [353]

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x = 3

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Double check your work:

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