hector8391 hector8391
  • 22-05-2021
  • Mathematics
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Help


Fjfjdjfjdjdjdjdjjfjfjfhfjd

Help Fjfjdjfjdjdjdjdjjfjfjfhfjd class=

Respuesta :

akposevictor
akposevictor akposevictor
  • 27-05-2021

Answer:

A. 69°

Step-by-step explanation:

Given:

m<FED = 179°

m<NED = 19x - 4

m<FEN = 12x - 3

Required:

m<FEN

Solution:

m<NED + m<FEN = m<FED (angle addition postulate)

19x - 4 + 12x - 3 = 179 (substitution)

Add like terms

31x - 7 = 179

31x - 7 + 7 = 179 + 7

31x = 186

31x/31 = 186/31

x = 6

✔️m<FEN = 12x - 3

Plug in the value of x

m<FEN = 12(6) - 3 = 72 - 3

m<FEN = 69°

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