10 in 30 in
50 in
A rectangle is removed from the middle of a larger rectangular shaped board. What is the area of the remaining board?

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