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fenix001 [56]
3 years ago
13

When a sound wave uncounters a barrier, what happens?

Mathematics
1 answer:
motikmotik3 years ago
8 0
A. The sound reflects I believe is the answer
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Prove the equation (2x+5)2 = 4x (x + 5) +25
shtirl [24]

Answer:  x = -5/2 and x = -3/2

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(2x + 5)2 = 4x (x + 5) +25

   4x + 10 = 4x² + 20x + 25

   [minus 4x on both sides.]

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