What is the value of this expression when z = 36? 10 - /z 4 6 -8 -26

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.

Find the length of the normal and the angle it makes with the positive x-axis. (see pictured below)