What are the coordinates of the image of triangle ABC after dilation with the center (0,0) and the scale factor of 3?

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?

Astore has clearance items that have been marked down by 60%. they are having a sale, advertising an additional 55% off clearance items. what percent of the original price do you end up paying?