Answer:
5.0n+7.0
Step-by-step explanation:
Perimeter of a rectangle = 2(L+W)
L is the length = 5n-2.5
W is the width = 2.5n+6
Perimeter of the rectangle = 2(5n-2.5+2.5n+6)
Perimeter of the rectangle = 2(2.5n+3.5)
Perimeter of the rectangle = 5.0n+7.0
Hence the perimeter of the rectangle is 5.0n+7.0
