## Algebra 2 (1st Edition)

$\frac{5}{2x}$
The area is: $(3x)(2x)-x(2x)=6x^2-2x^2=4x^2$. The perimeter is: $3x+2x+x+x+2x+x=10x$. Thus our ratio is: $\frac{10x}{4x^2}=\frac{5}{2x}$