at a bake sale there were 81 chocolate chip cookies sold if the ratio of chocolate chip cookies sold to oatmeal cookies sold 9:1 how many oatmeal cookies were sold I don't understand this question

If the graphs of the linear equations in a system are parallel, what does that mean about the possible solution(s) of the system? a. there are infinitely many solutions. b. there is no solution. c. there is exactly one solution. d. the lines in a system cannot be parallel.

Which statement about the graph of y = 8(0.25)^2

Find the measure of the interior angles of the following regular polygons: a triangle, a quadrilateral, a pentagon, an octagon, a decagon, a 30-gon, a 50-gon, and a 100-gon.