Which expression simplifies to 2√15

Use the data on the dot plot to answer the question. how many people read for more than three hours last week? i'm on a unit test review

Rhombus adef is inscribed into a triangle abc so that they share angle a and the vertex e lies on the side bc . what is the length of the side of the rhombus if ab=c, and ac=b.

Which is the graph of the following inequality?