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4 years ago

PLEASE PLEASE HELP!!!

Mathematics

1 answer:

Studentka2010 [4]4 years ago

5 0

Answer:

x = 8

Step-by-step explanation:

small triangle is similar to larger one

set up a proportion: 9 = x + 4

9+12 x+4+2x

9 = x+ 4 cross-multiply: 9(3x + 4) = 21(x + 4)

21 3x + 4 27x + 36 = 21x + 84

6x + 36 = 84

6x = 48

x = 8

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\\\\[-0.35em]
\rule{34em}{0.25pt}$

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