Answer:
Step-by-step explanation:
Perimeter of a square = 4 * Length of the square
Given
Length of a square = 4y + 7
Perimeter of the square = 4(4y+7)
Open the parenthesis
Perimeter of the square = 4(4y)+4(7)
Perimeter of the square = 16y + 28
Hence the perimeter of the square is 16y+28
