A step function is shown on the graph. What are the domain and range?

1. are the triangles similar and if so why? what is the value of x? show your work.

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?

Which of the following is best modeled using a linear equation y=ax+b, where a is less than 0?