Respuesta :

mhanifa

Answer:

  • 16) 102°
  • 18) 75°

Step-by-step explanation:

16)

∠QPR = 1/2(QR + SV)

  • 26x - 2 = 1/2(131 + 18x + 1)
  • 26x - 2 = 66 + 9x
  • 26x - 9x = 66 + 2
  • 17x = 68
  • x = 68/17
  • x = 4

∠QPR = 26*4 - 2 = 102°

18)

mBC = ?

∠BAC = 1/2(mBC + mFD)

  • 8x + 6 = 1/2(8x + 11 + 9x - 7)
  • 8x + 6 = 1/2(17x + 4)
  • 16x + 12 = 17x + 4
  • 17x - 16x = 12 - 4
  • x = 8

mBC = 8*8 + 11 = 75°

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