¿Cuál es el valor de la siguiente expresión: + − − + − + + ?​

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).

Select the quadratic that has root x = 8 and x = -5

On the first of each month sasha runs a 5k race she keeps track of her times to track her progress her time in minutes is recorded in the table