The area of a rectangular wall in a classroom is 280 square feet. Its length is 2
feet shorter than three times its width. Find the width of the wall of the
classroom.

The width of the wall of the  classroom is 10 feet and this can be determined by forming the quadratic equation.

Given :

The area of a rectangular wall in a classroom is 280 square feet. Its length is 2  feet shorter than three times its width.

The following steps can be used in order to determine the width of the wall of the  classroom:

Step 1 - Let the length of the rectangular wall be 'l' and the width of the wall be 'w'.

Step 2 - According to the given data the area of the rectangular wall is given by:

   --- (1)

Step 3 - Now, it is also given that the length of the wall is 2  feet shorter than three times its width that is:

l = 3w - 2

Step 4 - Substitute the value of 'l' in the equation (1).

280 = w(3w - 2)

Step 5 - So, (w = 10) is one of the factors of the above quadratic equation.

So, the width of the wall of the  classroom is 10 feet.

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The width of the classroom is 10 feet, if the area of a rectangular wall in a classroom is 280 square feet and Its length is 2  feet shorter than three times its width.

Step-by-step explanation:

The given is,

                   Area of rectangular is 280 square feet

                   Length is 2  feet shorter than three times its width

Step:1

            Formula for area of rectangular,

                                    ..............................(1)

           Where, w - width of the rectangle

                        l - Length of the rectangle

          From the given,

          Let, x- width of the rectangle

                     w = x...........................................................(2)

                      ...................................................(3)

          (  Length is 2  feet shorter than three times its width )

          Equation (1) becomes,

                           =

          Solution of the above equation,

                        x = 10 feet

Step:2

          Equation (2) becomes,

                             w = 10 feet

          Equation (3) becomes,

                             l = 28 feet

Step:3

         Check for solution equation (1) becomes,

                        280 = (28) (10)

                        280 = 280

Result:

            The width of the classroom is 10 feet, if the area of a rectangular wall in a classroom is 280 square feet and Its length is 2  feet shorter than three times its width.

step-by-step explanation: the declaration of the rights of man and of the citizen (french: déclaration des droits de l'homme et du citoyen de 1789), set by france's national constituent assembly in 1789, is a human civil rights document from the french revolution.[1]

the declaration was drafted by the abbé sieyès and the marquis de lafayette, in consultation with thomas jefferson.[2] influenced by the doctrine of "natural right", the rights of man are held to be universal: valid at all times and in every place, pertaining to human nature itself. it became the basis for a nation of free individuals protected equally by the law. it is included in the beginning of the constitutions of both the fourth french republic (1946) and fifth republic (1958) and is still current. inspired by the enlightenment philosophers, the declaration was a core statement of the values of the french revolution and had a major impact on the development of freedom and democracy in europe and worldwide.[3]

the 1789 declaration, together with the 1215 magna carta, the 1689 english bill of rights (1689), the 1776 united states declaration of independence, and the 1789 united states bill of rights, inspired in large part the 1948 united nations universal declaration of human rights