How many 12 are in 1/2 in 1/3 and in 1/4​

Which of those sequences is a geometric sequence

Determine the mean and variance of the random variable with the following probability mass function. f(x)=( 729divided by 91) (1 divided by 9) superscript x baseline comma x equals 1,2,3 round your answers to three decimal places (e.g. 98.765).

What value of x is in the solution set of 4x - 12 s 16 + 8x? -10 -9 -8 -7