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31 December, 22:27

The area of a rectangular floor is represented by 9x^2 + 15x square feet and the width of the floor is 3x feet. Which expression represents the length of the floor?

a. 8x ft

b. (3x + 5) ft

c. (3 + 5x) ft

d. (9x2 + 12x) ft

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Answers (1)
  1. 31 December, 22:34
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    To work this out, we must divide the area by the width

    (9x² + 15x) / 3x

    First 9x²

    9x² / 3x = 3x

    Then 15x

    15x / 3x = 5

    3x + 5 ft
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