Posted by **Yvette B.** on Friday, December 28, 2012 at 7:32pm.

If Z varies directly as X and inversely as Y, and Z = 9, when X = 5 and Y = 3, find X when Z = 18 and Y = 6

- Algbra 2 -
**Reiny**, Friday, December 28, 2012 at 7:42pm
"If Z varies directly as X and inversely as Y" ---> z =k(x/y)

when z=9, x=5,y=3

9 = k(5/3)

5k = 27

k = 27/5

So we have z = (27/5)(x/y)

for z=18, y = 6

18 = (27/5)(x/6)

27x = 540

x = 20

## Answer This Question

## Related Questions

- Pre-Algebra - If y varies directly with x, find the constant of variation with x...
- Math/Algebra - Im stuck on two problems and would really appreciate the help. 1...
- variation - Can you please check my answers? Thanxs! Write an equation that ...
- variation - Can you please check my answers? Thanxs! Write an equation that ...
- Variation-Check Problems - Can you please check my answers? Thanxs! Write an ...
- Check my answers. Algebra - Can you please check my answers? Thanxs! Write an ...
- Algebra II - 1. If y varies directly as x, and y=30 when x=4, find the constant ...
- Inverse Variation - Help me please.. Explain also :( 1. E is inversely ...
- Math102 - If x varies directly as y and y varies inversely as the square of z. ...
- Variation-Questions - I have some questions that I don't understand and need to ...

More Related Questions