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A rectangular ceiling tile has a perimeter of 68 inches and an area of 285 square inches. What are the dimensions of the tile?

Respuesta :

Answer:

See below ~

Explanation:

Let the length be 'a' and width be 'b'.

The equations formed :

⇒ 2(a + b) = 68 ⇒ a + b = 34

⇒ ab = 285 ⇒ a = 285/b

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Substitute the value of a in the first equation :

⇒ 285/b + b = 34

⇒ 285 + b² = 34b

⇒ b² - 34b + 285 = 0

⇒ b² - 19b - 15b + 285 = 0

⇒ b(b - 19) - 15(b - 19) =  0

⇒ b = 19, 15

⇒ These are the dimensions

⇒ Length will be the greater value and width will be the smaller value

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Solution :

Length = 19 inches

⇒ Width = 15 inches