The ratio of girls to boys in the junior high is 3 to 4. Which of these shows possible numbers of the girls and boys in the band?

Simply 8x squared + 5(7x squared- x) - 2x =

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=

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?