What is the speed of a wave that has a period of 20 s and a wavelength of 400 m?
Please help!!

How can writing phrases as algebraic expressions you solve problems?

Which shows the first equation written in slope-intercept form? 1/2 (2y + 10) = 7x

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