๐๐ผIn the following diagram, find the size of x, y and z:

Expand and simplify: ๐๐ผ(y+2)(y+5), ๐๐ผ(y-3)2
๐๐ผEstimate to 1 decimal place:
๐๐ผThe cost of a circular table is directly proportional to the square of the radius. A circular table with a radius of 40cm costs ยฃ50. What is the cost of a circular table with a radius of 60cm?