Eloise removes some books from a cabinet. The books have different thicknesses. This line plot shows the thickness of each book. She makes a stack of four books with the two thinnest books and the two thickest books.

How thick is the stack?

Enter your answer as a mixed number in simplest form by filling in the boxes.

If m 17 27 90 63 ** picture is attached

Which shows one way to determine the factors of 4x3 + x2 – 8x – 2 by grouping?

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.