What value of k will result in the quadratic having one rational solution if 4x^2 + kx + 4 = 0?

In the coordinate plan (-6,9) b (3,9) c (3,3) def is shown in the coordinate plan below

Find the area of a trapezoid with bases 14 cm and 18 cm and height 10 cm. 160 cm2 140 cm2 180 cm2 126 cm2

The number if marbles of different colors stored in a hat is listed below: 4 red marbles 10 green marbles 7 blue marbles. without looking in the hat, dan takes out a marble at random. he replaces the marble and then takes out another marble from the hat. what is the probability that dan takes out a blue marble in both draws?