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A rectangle s width is and its length is 3 4 Fi... - JSS2 Mathematics Algebraic Expressions II Question

A rectangle's width is 𝑤 and its length is 3𝑤+4. Find the perimeter.

The formula for the perimeter 

𝑃 of a rectangle is:

𝑃=2(Length+Width)

Substitute the given values:

𝑃=2((3𝑤+4)+𝑤)

=2(3𝑤+4+𝑤)

=2(4𝑤+4)

=8𝑤+8

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