If f(1)=7and f(n)=f(n-1)-4 then find the value of f(4)

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.

Graph the line y=4/3 x+1 . use the line tool and select two points on the line.

Find the axis of symmerty for x y=x squared -4x-8