SYS AS OF Solving a percent mixture problem using a... 075 A chef is going to use a mixture of two brands of Italian dressing. The first brand contains 9% vinegar, and the se brand contains 12% vinegar. The chef wants to make 360 milliliters of a dressing that is 11% vinegar. How much brand should she use? First brand: milliliters X 5 Second brand: milliliters