Answer:
The pitch of sound depends on the frequency of vibration. The higher the frequency the more shrill is the sound and vice versa.
Explanation:
Could you also please mark me as the brainliest answer.
Question:
If x = 2, y = 3 and z = -5, then x^2 + y^2 +2z = ?
Answer:

Explanation:
Given



Required
Determine 

Substitute values for x, y and z in the above expression:





Hi !!
the act of collecting, verifying, analising, and presenting information on events, issues and people is known as journalism , I guess... ???
bye :)