gustav88gm3apos gustav88gm3apos
  • 23-08-2016
  • Mathematics
contestada

Someone tell me, why and how is this operation.

P=2(l+w)=2·(100+40)=280

Respuesta :

dalendrk
dalendrk dalendrk
  • 28-08-2016
The distributive property: a(b + c) = ab + ac

2 · (100 + 40) = 2 · 100 + 2 · 40 = 200 + 80 = 280

or calculate: 2 · (100 + 40) = 2 · 140 = 280

P = 2(l + w) - is perimeter of a rectangle /l-length, w-width/
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