Question

A triangular park has side lengths of 3x+7,20x and 2(x-4).Write a simplified expression to represent the perimeter of the park

Answer 1

`25x-1`

Explanation:

`Perimeter\ is\ just\ the\ total\ length\ of\ the\ boundary\ of\ a\ polygon.\\It\ can\ be\ calculated\ by\ just\ adding\ all\ the\ corresponding\ sides\ of\ a\ polygon\ together.\\Here,\\Length\ of\ the\ 1st\ side=(3x+7)\\Length\ of\ the\ 2nd\ side=20x\\Length\ of\ the\ 3rd\ side=2(x-4)\\=2x-8\\Hence,`
`The\ perimeter\ of\ the\ triangular\ park=(3x+7)+20x+2(x-4)\\=3x+7+20x+2x-8\\=3x+20x+2x+7-8`

=25x-1