Ineed plz all of the questions plz

Compare these two waves: the blue and orange waves have the same pitch, but the blue wave is louder. the blue and orange waves have the same volume, but the blue wave has a higher pitch. the orange wave has a higher pitch, but the blue wave is louder. the blue wave has a higher pitch, but the orange wave is louder.

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=

For what values of x is x2 + 2x = 24 true?