Okay, here we have this:
Considering the provided figure, we are going to calculate the requested perimeter, so we obtain the following:
So let's remember that the perimeter of a figure is equal to the sum of the measures of all the sides, so we have:
Perimeter=9 in + 4 in+ 5in+ (4 in - 3 in )+ 5 in
Perimeter=9 in + 4 in+ 5in+ 1 in + 5 in
Perimeter=24 in
Finally we obtain that the perimeter is equal to 24 inches.