Question

a rectangular picture frame has a width of 9 cm and a length of x cm. which expression represents the perimeter of the picture frame? 2(x + 18) 2x + 9 2x + 18 x + 9

Explanation:

Step1: Recall perimeter formula

The perimeter $P$ of a rectangle is $P = 2(l + w)$, where $l$ is length and $w$ is width.

Step2: Substitute values

Given $l=x$ and $w = 9$, we have $P=2(x + 9)$.

Step3: Expand the expression

$2(x + 9)=2x+18$.

Answer:

$2x + 18$