Answer:
Speed = 20 m/s
Step-by-step explanation:
The formula to find the speed of a wave is found by
Speed = Wavelength x Frequency where the frequency is in HZ and the wavelength is in meters
Speed = .80*25
Speed = 20 m/s
Hey if you add each letter the possible outcome is 8
Answer:
Step-by-step explanation:
X + 3x + 5x = 180
9x = 180
x = 20
So the angles are
20
60 and
100
The zeros of function are x-s, for which f(x) = 0:
![f(x)=\dfrac{1}{2}x^3-x\\\\f(x)=0\iff\dfrac{1}{2}x^3-x=0\ \ \ \ |\cdot2\\\\x^3-2x=0\\\\x(x^2-2)=0\iff x=0\ \vee\ x^2-2=0\\\\x=0\ \vee\ x^2=2\\\\\boxed{x=0\ \vee\ x=-\sqrt2\ \vee\ x=\sqrt2}](https://tex.z-dn.net/?f=f%28x%29%3D%5Cdfrac%7B1%7D%7B2%7Dx%5E3-x%5C%5C%5C%5Cf%28x%29%3D0%5Ciff%5Cdfrac%7B1%7D%7B2%7Dx%5E3-x%3D0%5C%20%5C%20%5C%20%5C%20%7C%5Ccdot2%5C%5C%5C%5Cx%5E3-2x%3D0%5C%5C%5C%5Cx%28x%5E2-2%29%3D0%5Ciff%20x%3D0%5C%20%5Cvee%5C%20x%5E2-2%3D0%5C%5C%5C%5Cx%3D0%5C%20%5Cvee%5C%20x%5E2%3D2%5C%5C%5C%5C%5Cboxed%7Bx%3D0%5C%20%5Cvee%5C%20x%3D-%5Csqrt2%5C%20%5Cvee%5C%20x%3D%5Csqrt2%7D)