A triangle PQR has coordinates (1, 3), (5, 1) and (3, k) respectively in an anticlockwise direction).
Find the value of k if the triangle's area is 6 units?

Several paint mixtures are made by mixing blue paint and white paint. paint colors blue paint white paint mixture a 5 cups 12 cups mixture b 6 cups 6 cups mixture c 4 cups 12 cups mixture d 5 cups 6 cups which mixture has the highest ratio of blue paint to white paint