Which system of equations has the same solutions as the system below? 3x − y = 7 2x + 3y = 12 (1) 6x - 2y = 14, -6x + 9y = 36
(2) 18x - 6y = 42, 4x + 6y = 24
(3) -9x - 3y = -21, 2x + 3y = 12
(4) 3x - y = 7, x + y + 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