If a state issued license plates using the scheme of two letters followed by four digits, how many plates could it issue?

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 equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

Evaluate the expression. (9 + 5)(3 + 2)0