Activity 2. Solve for the unknown.

1. If x varies jointly as y and z and x = 12 when y = 1 and z = 6, find x when y = 6 and z= 10.

2. If z varies jointly as x and y and if z = I when y = 2 and x = -3, find x when z=2 and y = 4 y

3. If x varies directly as y and inversely as z, and if x = 30 when y = 2 and z 3, find y = 2 = 15 and x = 30. 3​