If the measure of an angle is 13 find the measure of its supplement

Give all possible names for each angle shown. calculation tip: in angle abc, b is the vertex.

There are 12 boy and13 girls in a class. if the teacher randomly chooses a student’s name out of a hat what is the probability it will be a girl

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)