Question

The expression 4x gives the perimeter of a square with a side length of x units.
What is the perimeter of a square with a side length of 5/7 units?

Answer 1

$4x$ where $x = 5/7$

$=4 * 5/7$

$= 20/7$

$= 14/7 + 6/7$

$= 2$   $6/7$

Answer 2

Answer:

The perimeter is $\frac{20}{7}$ units.

Step-by-step explanation:

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

So the function would be,

$f(x)=4x$

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 $\dfrac{5}{7}$, so we have to put x as $\dfrac{5}{7}$ in the function.

Hence, the perimeter will be,

$f(\frac{5}{7})=4(\frac{5}{7})=\frac{20}{7}$ units