Adance floor is in the shape of a rectangle. it is 21 meters long and16 meters wide. what is its perimeter?

Step-by-step explanation:

By definition the perimeter of a rectangle is the sum of the lengths of its 4 sides.

The formula for calculating the perimeter of a rectangle is as follows:

Where P is the perimeter, w is the width and l is the length.

In this case we want to find P and we know that:

Therefore:

the system of inequalities is

step-by-step explanation:

step 1

find the equation of the dashed line

we have the points

(0,0) and (3,1)

the line passes through the origin, so, is a direct variation

find the slope

the equation of the dashed line is

the solution of the inequality a s the shaded area above the dashed line

therefore

the equation of the inequality a is

step 2

find the equation of the solid line

we have the points

(4,0) and (0,4)

find the slope

the equation of the solid line is

the solution of the inequality b s the shaded area below the solid line

therefore

the equation of the inequality b is

step 3

the system of inequalities is