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)

asked Jul 4, 2017 168k views

3 votes

by Buren

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5 votes

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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