Which expression is equivalent to is Measure of angle 4?

A Measure of angle 2 + measure of angle 3
B Measure of angle 1 + measure of angle 2
C Measure of angle 1 + measure of angle 3
D Measure of angle 5 + measure of angle 6

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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

For problems 29 - 31 the graph of a quadratic function y=ax^2 + bx + c is shown. tell whether the discriminant of ax^2 + bx + c = 0 is positive, negative, or zero.