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Find an expression for the area and the perimeter of the rectangle. Let the length = 3 and the width =(7-4x).

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Answer:

The expression for the area is;


21-12x

Step-by-step explanation:

Given that the length of the rectangle is 3 and the width is (7-4x);


\begin{gathered} l=3 \\ w=7-4x \end{gathered}

Recall that the area of rectangle can be calculated by multiplying its length by the width.


A=l* w

So, the expression for the area of the given rectangle is;


\begin{gathered} l* w \\ 3*(7-4x) \\ 3(7-4x) \\ 21-12x \end{gathered}

Therefore, the expression for the area is;


21-12x
User Tholu
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