At the end of a certain year, the four companies with the largest number of home internet users in the united states were microsoft, time warner, yahoo, and google, with a combined audience of 284 million users. taking x to be the microsoft audience in millions, y the time warner audience in millions, z the yahoo audience in millions, and u the google audience in millions, it was observed that

z - u = 3(x - y) +24

x + y = 44 + z + u

and x - y + z - u = 48

microsoft million
time warner million
yahoo million
google million
how large was the audience of each of the four companies at the end of that year?

Afudge recipe calls for 1/2 cup of cocoa if only 1/2 of the recipe is made to how much cocoa should you use

Liz is shipping a package to her friend. the maximum weight of a medium flat-rate box is 20 pounds, including the box which weighs 6 ounces. write and solve an inequality to describe the possible weight in pounds, w, of the contents that liz will ship to her friend if she must use a medium flat-rate box. use the drop-down menus to explain your answer.

(50 ) mrs. julien’s and mrs. castillejo’s classes are selling cookie dough for a school fundraiser. customers can buy packages of macadamia nut chip cookie dough and packages of triple chocolate cookie dough. mrs. julien’s class sold 25 packages of macadamia nut chip cookie dough and 30 packages of triple chocolate cookie dough for a total of $221.25. mrs. castillejo’s class sold 5 packages of macadamia nut chip cookie dough and 45 packages of triple chocolate cookie dough for a total of $191.25. (a) write the system of equations that model the problem. be sure to explain which equation represents which situation. (b) find the cost of each type of cookie. show your work. (c) explain which method you used to solve the system and why you chose that method.