How would you solve "2sin(7θ)[(cos9θ(θ)-sin^2(θ))+(sin( 9θ(2θ))]-2" ?

Fill in the blank 1. a rhombus is a rectangle a) always b) sometimes c) never 2. a square is a quadrilateral a) always b) sometimes c) never 3. a trapezoid is a kite a) always b) sometimes c) never 4. a quadrilateral is a kite a) always b) sometimes c) never 5. a square is a rhombus a) always b) sometimes c) never 6. a parallelogram is a rectangle a) always b) sometimes c) never

Solve the equation for b: a= (1/2)(b)(h)

What are linear equations? could'ya explain too me, ? ! and how do you see what graph is a proportional relationship?