x is element of R and 3x+3 is an odd number. according to this which of the below is certainly an even number?

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

Negative 5 1/12 + negative 4 1/4 + 6 3/4

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?