Asolid is 5 cm tall ,3 cm wide and 2cm thick what is it's density

Lena reflected this figure across the x-axis. she writes the vertices of the image as a'(−2, 8), b'(−5, 6), c'(−8, 8), d'(−4, 2).

If the value of cos330°is√3/2 then find cos 165°.

What is the solution to the system of equation graphed belowa.(0,-4)b.(2,5),1),-3)