6x + (-15x)
help! i don’t get how to do this

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

Including 6% sales tax, an inn charges $135.68 per night. find the inns nightly cost

How to simply and write the answer n a whole number