if x varies jointly as y and z,and x=8 when y=4 and a=9,find z when x=16 and y=6 Question if x varies jointly as y and z,and x=8 when y=4 and a=9,find z when x=16 and y=6 in progress 0 Math Kennedy 1 week 2021-10-13T23:59:09+00:00 2021-10-13T23:59:09+00:00 1 Answer 0

## Answers ( )

Answer:z=12

Step-by-step explanation:It is given that x varies jointly as y and z, it means

where, k is the constant of proportionality.

It is given that x=8 when y=4 and z=9

Divide both sides by 36.

The value of k is 2/9.We need to find the value of z when x=16 and y=6.

Substitute x=16 and y=6 in the above equation.

Multiply both sides by 3.

Divide both sides by 4.

Therefore, the value of z is 12.