Answer:
24
Step-by-step explanation:
Lets visualize this:
Draw a rectangle. We can say that the length of the rectangle is x. We know that the width is 4 feet less than the length, so set the other side to x-4.
Now, multiply length and width to find what x is with the given area.
[tex]x(x-4)=32\\x^{2} -4x-32=0\\(x-8)(x+4)=0\\x=8, -4[/tex]
However, we cannot have a negative side length, so we will disregard x = -4.
Now that we have what x is, we can find each side length:
[tex]x = 8\\x-4 = 4[/tex]
Finally, find the perimeter with these values:
[tex]P = 8+4+8+4=24[/tex]