What quadrilateral always has 4 congruent angles and opposite sides that are congruent and parallel?

Heather is writing a quadratic function that represents a parabola that touches but does not cross the x-axis at x = -6. which function could heather be writing? fx) = x2 + 36x + 12 = x2 - 36x - 12 f(x) = -x + 12x + 36 f(x) = -x? - 12x - 36

When is g(x) = 0 for the function g(x) = 5.23x + 4?

Which of the following represents the length of a diagonal of this trapezoid?