Answer:
8x² + 38y
Step-by-step explanation:
Perimeter = 2(x + 10y) + 2(4x² - x + 9y)
⇒ Perimeter = 2x + 20y + 8x² - 2x + 18y
⇒ Perimeter = 8x² + 38y
8x²+38y
perimeter of rectangle: 2(Length + Width)
perimeter of this rectangle:
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