Janelle and three of her friends bought four smoothies for a total of $3. if she purchases smoothies on another day for herself and 9 of her friends, how much money will she spend?

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 does the relationship between the mean and median reveal about the shape of the data

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?