How do I find the inverse and it’s relation to the function f(x)?

If f(x)=x^3 and g(x)=2x+7 when g(x)=-5

Which of the following values are in the range of the function graphed below? check all that apply ! - will give the answer "brainliest! "

What is the value of the discriminant of the quadratic equation -2x = -8x + 8 and what does its value mean about thenumber of real number solutions the equation has?