ππΌ Factorise 9y^{2} – 49w^{2}

ππΌ Solve

ππΌ Simplify (2x^{4}y)^{3}

ππΌ A sector has side length 4cm and area 10cmΒ²

What is the size of the angle which describes the sector?

ππΌ A circle has equation

What is the length of its radius?