Final answer:
To find the perimeter of the garden, we need to add up the length of the four sides. The expression for the perimeter of the garden is 4x + 6.
Step-by-step explanation:
The perimeter of a rectangle is the sum of all its sides.
To find the perimeter of the garden, we need to add up the length of the four sides.
The width of the rectangle is x+3 and the length is x.
The perimeter is equal to 2 times the width plus 2 times the length: 2(x+3) + 2x
Simplifying the expression gives us: 2x + 6 + 2x = 4x + 6
Therefore, the expression for the perimeter of the garden is 4x + 6.