Larissa is writing a coordinate proof to show that the diagonals of a square are perpendicular to each other. she starts by assigning coordinates as given.

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

Is trapezoid abdc the result of a dilation of trapezoid mnpq by a scale factor of ? why or why not? yes, because ab and cd are each the lengths mn and qp. yes, because sides ab and cd are parallel to sides mn and qp. no, because ab is the length mn but cd is the length qp. no, because sides ab and cd have different slopes from sides mn and qp.

Which expression is rational? 6. , square root two, square root 14, square root 49