A box contains 3 black pens, 7 blue pens and 5 red pens. Without replacing the first pen, what is the probability of pulling a red or blue pen?

What term best describes a line and a point that lie in the same plane? a. congruent b. coplanar c. collinear d. equal

The figures below are made out of circles, semicircles, quarter circles, and a square. find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations).

Factor the expression using the gcf. the expression 21m−49n factored using the gcf