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Vika [28.1K]
3 years ago
11

Help please .....................

Mathematics
2 answers:
Svetach [21]3 years ago
5 0

Answer:

Its A

Step-by-step explanation:

elixir [45]3 years ago
3 0

Answer:

f(-5) = 22

Step-by-step explanation:

All we do is substitute x = -5 into the function.

= -3(-5) + 7

= 15 + 7

= 22

Best of Luck!

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A sound wave enters a new medium where sound travles faster. How does this affect the frequency and wavelength of the sound?
zhenek [66]

Answer:

The frequency doesn't change. If the wavespeed increases, then the wavelength must also increase ... It's just the distance the wave travels during each complete wiggle.

Step-by-step explanation:

  • Sound waves are a type of mechanical wave which requires a material medium for transmission. The transmission of such waves occurs as a result of vibration of particles in the material medium. The faster the vibration of the particles the higher the speed of the sound waves.
  • When a sound enters a new medium where the sound travels faster, it means the vibration of particles is high, and the wavelength of the waves increases which means the speed of the wave has increased. The frequency on the other hand will remain constant.

4 0
3 years ago
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Answer:

i Don't know this but other's can help you.

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3 years ago
Given that E=MC find E when M=20 and C =2.5<br><br>​
tresset_1 [31]

Answer:

50 or 125

Step-by-step explanation:

if u want E=MC then it would be 20 ×2.5=50

OR

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ACCORDING TO ME THIS SHOULD BE THE ANSWER, BUT NOT QUITE SURE ABOUT THIS.

8 0
2 years ago
Read 2 more answers
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Step-by-step explanation:

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