Select all the systems of equations that have exactly one solution. {y=3x+1y=−3x+7 {y=3x+1y=x+1 {y=3x+1y=3x+7 {x+y=102x+2y=20 {x+y=10x+y=12 Select all the systems of equations that have exactly one solution. {y=3x+1y=−3x+7 {y=3x+1y=x+1 {y=3x+1y=3x+7 {x+y=102x+2y=20 {x+y=10x+y=12

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