The expression 4x gives the perimeter of a square with a side length of 3 units.

What is the perimeter of a square with a side length of 5 units?

The perimeter is units.

Step-by-step explanation:

The expression gives the perimeter of a square with a side length of x units.

So the function would be, where,

f (x) is the function which gives the perimeter of the square, x as the side length.

As have to find the perimeter of a square with side length as, so we have to put x as in the function.

Hence, the perimeter will be, units