How do I do 6, 7, 8, 9 and 10?

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

Graph the equationy=x^2 -[tex]y = x^{2} - 2[/tex]

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.