(cos^x-sin^2x)^2 - sin4x +sin^2x =0

Which solid has two triangular bases and three lateral faces, each in the shape of a rectangle? triangular prism triangular pyramid rectangular prism rectangular pyramid

What is 20+(5 x 2/5 )+ 3 show your work

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left