๐๐ผFind the perimeter of this sector:

๐๐ผSolve the simultaneous equations:

x + y = 3

x^{2}+y^{2}=5

๐๐ผFind x and y:

๐๐ผy is inversely proportional to x squared.

When y is 100, x is 2. Find y when x is 4.

๐๐ผWork out 64^{2/3}