# Algbra 1

x varies directly with y and z x=1200,when y=20 and z=30. Find x when y=10 and z=20

1. 👍
2. 👎
3. 👁
1. x varies directly with y and z ---> x = k(yz)
1200 = k(20*30)
k = 2

so x = 2yz

now plug in your other y and z to find x

1. 👍
2. 👎

## Similar Questions

1. ### Math

Find the value of y for a given value of x, if y varies directly with x. If y = –252 when x = 84, what is y when x = 74?

2. ### algebra

Determine whether y varies directly with x if so find the constant of variation k 3y=-7 x-18

3. ### Algebra worksheet

Hello. My algebra teacher gave me this worksheet last week and everyone had to bring it yesterday and I haven't done it yet. Can someone please help me. He said Friday is the last day or he's going to take away some points. I've

4. ### math

p varies directly as q and the square of r and inversely as s write the equation of the relation find k if p=40 q=5 r=4 s=6 find p when q=8 r=6 and s=9 find s when p=10 q=5 r=2

1. ### algebra

Find the value of y for a given value of x if y varies directly with x if y=2.52 when x=8.4,what is y when x=2.7 thanks

2. ### Algebra II

if y varies directly as x, if y=80 when x=32, find x if y=100

3. ### variation

Can you please check my answers? Thanxs! Write an equation that expresses the relationship. Use k as the constant of variation. 20. f varies jointly as b and the square of c. -I got: f=kbc^2 22. r varies jointly as the square of s

4. ### algebra

Show all steps Find the value of y fora given value of x if y varies directly with x If y =-252 when x=84, what is y when x=74?

1. ### Mathematics

M varies directly as n and inversely as p. if M=3, when n=2,and p=1, find M in terms of n and p

2. ### algebra 2

suppose y varies directly with x, and y=12 when x=-4. find x when y=15. x=?

3. ### algebra

suppose that S varies directly as the 2/5 power of T, and that S=8 when T=32. Find S when T=243.

4. ### Pre-Algebra

If y varies directly with x, find the constant of variation with x = 4 and y = -24 If y varies inversely with x, find the constant of variation with x=5 and y = 10 If y varies directly with x, and y = 35 when x = 5 , find x when y