viannelaramirez viannelaramirez
  • 07-09-2016
  • Mathematics
contestada

B is the midpoint of AC, AB = 3x - 8 and BC = x + 4. Find AB

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Sofiadecredico
Sofiadecredico Sofiadecredico
  • 07-09-2016
since b is the midpoint BC is half the line so we can set up this equation

x+4+X+4=3x-8

and then solve like normal

2x+8=3x-8

16=x

once you have x then solve x+4

16 + 4 =20

AB is 20
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