Please help I need the full answer

What are the domain and range of the function? f(x) = -4 (sqrt)x

What is the multiple zero and multiplicity of f(x) = (x ? 3)(x ? 3)(x + 5)? multiple zero is 3; multiplicity is 2 multiple zero is 5; multiplicity is 1 multiple zero is ? 5; multiplicity is 1 multiple zero is ? 3; multiplicity is 2

Me asap! what is the slope of this line? enter your answer in the box.