What is the property of cd=dc

Find the required measurements of the following trapezoids. a = 8 cm b = 16 cm h = 10 cm

Jack has a piece of red ribbon that is two times as long as his piece of blue ribbon. he says that he can use two different equation to find out how long his piece of red ribbon is compared to his piece of blue ribbon is. is he correct? explain his reasoning

Plot a point at the y-intercept of the following function on the provided graph. 3y=-5x+7 20 points