dalia47 dalia47
  • 12-06-2019
  • Mathematics
contestada

I don't understand?

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I dont understand class=

Respuesta :

jimrgrant1 jimrgrant1
  • 12-06-2019

Answer:

see explanation

Step-by-step explanation:

The perimeter (P) is the length of all 3 sides of the triangle

The triangle is isosceles with 2 equal sides 20 - 7xy

P = 20 - 7xy + 20 - 7xy + 12 = 52 - 14xy

When x = 2, y = 1, then

P = 52 - 14(2)(1) = 52 - 28 = 24

 

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