Posted by **tyler** on Tuesday, June 21, 2011 at 9:21am.

Determine the equation of joint variation. Then solve for the missing value.

x varies directly with y and z.

x = 400 when y = 8 and z = 10.

Find x when y = 10 and z = 12.

- math -
**MathMate**, Tuesday, June 21, 2011 at 9:47am
If

"x varies directly with y and z",

that means

x=kyz, where k is a constant.

Since

x = 400 when y = 8 and z = 10

or

400=k(8)(10),

we can readily solve for k=5.

Hence solve for x when

when y = 10 and z = 12

(hint: k=5)

- math -
**Anonymous**, Tuesday, January 10, 2012 at 9:45am
Determine the equation of combined variation. Then solve for the missing value.

x varies directly with y and inversely with z.

x = 5 when y = 10 and z = 5.

Find x when y = 20 and z = 10.

## Answer this Question

## Related Questions

- ALGEBRA 1 - Determine the equation of combined, then solve for the missing value...
- algebra - Determine the equation of combined variation. Then solve for the ...
- Variation - I have few questions that I need checked please and could you help ...
- 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 - Hi! Can you please re-check my answers. Mt teacher said some of them ...
- algebra1 - M varies directly with n; m=144 when n=8. What is the constant of ...
- algebra - Could someone show me how to solve this joint variation problems? Y ...

More Related Questions