It is said that healthy and happy workers are efficient and productive. A company that manufactures exercising machines wanted to know the percentage of large companies that provided on-site health club facilities. A sample of 240 companies showed that 96 of them provide such ...
April 30, 2014
Well first you change x - 2y = .9 to x = .9 + 2y, by adding y from both sides of the equation. Then, you substitute x=.9 + 27 into 4x - 3y = 13.1 to get 4(.9 + 2y)- 3y= 13.1. Use the distrubutive property and you get 4 * .9 = 3.6 and 4 * 2y = 8y. Now you have 3.6 + 8y - 3y = ...
February 1, 2013