If x is inversely proportional to y and x = 2\(\frac{1}{2}\) when y = 2, find x if y = 4

W is directly proportional to U. If W = 5 when U = 3, find U when W = \(\frac{2}{7}\)

If w varies inversely as \(\frac{uv}{u + v}\) and is equal to 8 when

u = 2 and v = 6, find a relationship between u, v, w.

Given that x2 + y2 + k = 60 and x = \(\sqrt{10}\) when y = 4, find the value of k.

If w varies inversely as \(\frac{uv}{u + v}\) and w = 8 when

u = 2 and v = 6, find a relationship between u, v, w.