- Simplify 4x^3y-2 2x^-1y^4 ??? PLEASE HELP SHOW WORK?

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Describe the relationship between the following: wave height, wavelength, wave speed, and wave steepness? I need a physics joke/pun for the next time I see my professor at lunch and just wanna say "hi".? If y= f(x)= 4x-7/2x-4 then prove that f(y) = x? Forces of 99 N [S] and 64 N [E] act on an object of mass 27 kg. What is the acceleration of the object? Could it have any relation between quantum physics and spirituality?