Points d, e, and f are on circle c and ef ≅ df. what is the measure of ∠cdf?

Olga used 100 ounces of flour to make 225 muffins. how many ounces of flour will be used to make 300 muffins?

What will the graph look like for a system of equations that has no solution? a. the lines will be perpendicular. b. the lines will cross at one point. c. both equations will form the same line. d. the lines will be parallel.

What effect would doubling all the dimensions of a triangular pyramid have on the volume of the pyramid? explain your reasoning.