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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(9x^2+12x)ft
I don't know how to solve this.
Help please!

6 answers

divide the area by the width to get the length

(9x^2 + 15x) / 3x = ?

factor: 9x^2+15x

3x^3+5x^2
Thank you so much @Scott.
Your a lifesaver!

Thanks @Bobpursley

3x+5 !!!!

Ya figured that out

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