Question

Ayuda porfavor :D...

Answer 1

Respuesta:

1. 8

2. 6

Explicación paso a paso:

1.

AB = 12

AM = 2MB

Entonces Si: MB = x

AM = 2x

AM + MB = AB

2x + x = 12

3x = 12

x = 4

Por tanto: AM = 2x = 2(4) = 8

2.

AD = 20

AC = 12

BD = 14

BC = x

Del Grafico:

AB + BC + CD = AD .......(1)

Pero:

AB = AC - BC = 12 - x

CD = BD - BC = 14 - x

reemplazando en (1):

(12 - x) + (x) + (14 - x) = 20

26 - x = 20

x = 26 - 20

x = 6

Por tanto: BC = x = 6