Answer:
P = 20x - 12
Explanation:
The Perimeter of a Rectangle is 2l + 2w, where l is the length and w is the width.
Now, let's substitute the given values.
2(8x - 9) + 2(2x + 3)
= 16x - 18 + 4x + 6
= 20x - 12 <--- This is the answer
Hope this helps!