At a fabric store, they can cut a length of fabric off a big roll, so you can buy any length you like. the cost for 3 feet of silk fabric is $9.75. how much would you pay for 20 feet of silk fabric, at this rate?

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).

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

The linear combination method is applied to a system of equations as shown. 4(.25x + .5y = 3.75) → x + 2y = 15 (4x – 8y = 12) → x – 2y = 3 2x = 18 what is the solution of the system of equations? (1,2) (3,9) (5,5) (9,3)