The price of a packet of salt goes up by 9 cents. The old price is four-fifths of the new price. Find the old and new prices.

3. solve the given inequality and graph the solution on a number line.

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 is the first step of an indirect proof of a number that is divisible by two