A room which is 5m long and 4m wide has a linoleum of 1/2m bored all around it. Find the length and width of the linoleum and hence the area of the linoleum

What is the factored form of the following expressions? d^2 – 13d + 36

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.

What is the missing value in the proportion 4/5 = x/30