Which of these equations are true when the value of y is 27? I. −9 + y = 18
II. −18 + y = −45
III. 5y = 135
IV. 2y = 29

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