Answer:
Explanation:
The perimeter of squares is just 4s
Since the bigger square has sides of 2x+1 and the smaller has sides of x the difference of perimeters is
d=4(2x+1-x)
d=4(x+1)
d=4x+4, and d=16 so
4x+4=16
4x=12
x=3 so the smaller square has sides of 3 and an area of
A=x^2
A=3^2
A=9