Question

Z varies inversely with x and directly with y. When x=6, y= 2, z=5. What is the value of z when x=4 and y=9?

Answer 1

Answer:

Step-by-step explanation:

Answer 2

Answer:

Step-by-step explanation:

LET    z =  k y/x

given   x=6 , y=2 , z=5

       5 = k[2/6]

        5 = k/3

          k = 15

then   z = 15y/x

         z = 15 [9/4] =135/4