Help ASAP!!

Put the polynomial in standard form

5x-3x^3+1+6x^2

A: -3x^3+6x^2+5x+1
B: 1+6x^2+5x-3x^3
C: 6x^2+5x-3x^3+1
D: -3x^3+5x+6x^2+1

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

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)

Acircle has a circumference of 28.36 units what is the diameter of the circle