The expression 3x+13 represents the side length of the square in units.
Step-by-step explanation:
Let the a be the side length of the square in units.
The perimeter of a square is
It is given that a square has a perimeter of 12x+52 units. Substitute P=12x+52 in the above formula, to find the expression that represents the side length of the square in units.
Divide both sides by 4.
Therefore expression 3x+13 represents the side length of the square in units.