1) 9x-3y+7-4x+y-3 simplified 2)-8x+7y-x-6y+4x simplified
3)x+5-2x+3y-y simplified
4) x-3+5x+6y+8x-9

Help!!

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

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

This is about circle theorems. someone asap : (