Question

Create a simplified expression for the perimeter of this rectangle. Horizontally it is labelled 3x-11, and vertically it is labeled x+9. What do I do??

Answer 1

Here the length of the rectangle is $L=3x-11$ and the width is $W= x+9$. To find the perimeter $(P)$  of this rectangle $P=2(L+W)=2((3x-11)+(x+9))=2(4x-2)=8x-4$  

The perimeter of this rectangle is $P=(8x-4)$