Mila wants to spend at least $20 on a classified ad in the newspaper. she has $12, how much does she need? i need an equation with an inequality : ) you!

Write a real-world solution that can be represented by the equation y = 7x be sure to explain what the variables represented in the solution

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).

How do i do this activity, is appreciated