Respuesta :

mhanifa

Answer:

11.6

Step-by-step explanation:

Solving with steps as below:

  • 31*r+1.1*(35−31)*r = 410.64
  • 31r + 1.1*4r = 410.64
  • 31r + 4.4r = 410.64
  • 35.4r = 410.64
  • r = 410.64/35.4
  • r = 11.6

Answer is: r =11.6

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