Ajar contains 20 marbles, of which 4 are red, 12 are black, 3 are green, and 1 is yellow.
What is the probability that a randomly selected ball is green?

The construction of copying qpr is started below. the next step is to set the width of the compass to the length of ab. how does this step ensure that a new angle will be congruent to the original angle?

Which term describes the point where the perpendicular bisectors of the three sides of a triangle intersect?

Find the probability that -0.3203 < = z < = -0.0287 find the probability that -0.5156 < = z < = 1.4215 find the probability that 0.1269 < = z < = 0.6772