Ella's purse has different accessories. 9 hair clips
2 headbands
3 barrettes
4 hair ties
Which of the following statements is correct?
A.
For every hair clip, there are three barrettes.
B.
For every headband, there are two hair ties.
C.
For every headband, there are three hair ties.
D.
For every barrette, there are two hair clips.

Agraph of a trapezoid can have diagonals with slopes that are negative reciprocals and two pairs of adjacent sides that are congruent, true or false, and why

Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.

Ametal rod is 2/5 meters long. it will be cut into pieces that are each 1/30 meters long. how many pieces will be made from the rod?