Question

A rectangle's length is 4 feet more than its width. If the area of the rectangle is 396 square feet, what is its width, in feet?

***please show step by step!! and explain!! thanks!! :D

Answer 1

***No answer choices in this one :/

Answer 2

isn't this same as last one ?

Answer 3

its similar i think... but this time they give me the area.... so is the equation i use the one we found in the last one?

Answer 4

\[A_{\text{rectangle}}=\ell\times w\]

\[\ell=(4+w)\]\[A_{\text{rectangle}}=396\]

Answer 5

use that ^

Answer 6

what @UnkleRhaukus wrote?

Answer 7

Arectangle=ℓ×w


ℓ=(4+w)
Arectangle=396

Answer 8

\[396=(4+w)w\]

Answer 9

so i get this?
396=4w+w^2

Answer 10

simplify the equation by bringing all the terms to one side,


then solve, using the quadratic equation