Quadrilateral abcd has vertices a(-2, 3), b(0, 4), c(3, 6), and d(1, 1). the vertices of quadrilateral efgh are e(-2, -3), f(0, -4), g(3, -6), and h(1, -1). which single transformation of quadrilateral abcd can be used to show that the two quadrilaterals are congruent?

Amass weighing 16 pounds stretches a spring 8/3 feet. the mass is initially released from rest from a point 2 feet below the equilibrium position, and the subsequent motion takes place in a medium that offers a damping force that is numerically equal to 1/2 the instantaneous velocity. find the equation of motion if the mass is driven by an external force equal to f(t)=cos(2t).