The graph of a function is (always sometimes never) a line

Using the side-splitter theorem, daniel wrote a proportion for the segment formed by luke segment de. what is ec?

One positive number is 9 more than twice another. if their product is 95, find the numbers

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?