Brett asked George and Danielle to help him hang up 30 posters for a school dance. He gave 15 of the posters to George. He gave 13 of the remaining posters to Danielle. Brett hung the remaining posters. How many posters did Brett hang?

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)

We just started the introduction into circles and i have no idea how to do this.