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1.) Y varies jointly as x and z, if x = 3, when y=-36 and z =2. Find y when x = 4, and z = -3

2.) Y varies jointly as x and z, if x = -4, when y =72 and z =2. Find x when y=4 and z =-3

3.) Y varies jointly as x and z, if x =8, when y = 4 and z =-2. Find y when x =2 and z= - 3

4.) Y varies jointly as x and square root of z, if x = 10, when y = 15 and z=4, find y when x = -2 and z = 9

5.) Y varies jointly as x and z, if x = 10, when y = 5 and z =3. Find y when x = -1/2, and z = 1/3

Pa help po please, thank you. ​