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juin [17]
3 years ago
14

Need help!!!!!!!!!!!!

Mathematics
1 answer:
Xelga [282]3 years ago
8 0

Step-by-step explanation:

the perimeter of a rectangle is

2×length + 2×width =

2×(x + 10y) + 2×(7x² - x + 9y) =

2x + 20y + 14x² - 2x + 18y =

14x² + 38y

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