Saturday

April 19, 2014

April 19, 2014

Posted by **Jay** on Friday, March 30, 2012 at 10:54pm.

- algebra -
**Reiny**, Saturday, March 31, 2012 at 7:57amz varies directly as x^2 -----> z = kx^2 , where k is a constant

if z=36, x = 3

336 = k(9)

k = 4

so y = 4x^2

when x=4 , y = 4(16) = 64

or , by ratio ....

z1/z2 = x1^2/x2^2

z1/36 = 4^2/3^2

z1 = 36(16/9) = 64

**Related Questions**

Math - DIRECT VARIATION 1. a is directly proportional to b.If a=15,then b=9 2. m...

math - t varies directly as the square root of l. If l=81, then t=10 what is the...

algebra 2 - y varies directly with x. When y = 20, x = 50. Find x when y = 36.

algebra - y varies directly with x. When y = 20, x = 50. Find x when y = 36.

algebra1 - M varies directly with n; m=144 when n=8. What is the constant of ...

Algebra II - 1. If y varies directly as x, and y=30 when x=4, find the constant ...

algebra - I do not know where to start with this one. Suppose p varies directly ...

Math - This is regarding direct variation. y varies directly as the square of R...

Variation - I have few questions that I need checked please and could you help ...

Math - W varies directly as x,y,and z. If w=36 when x=2, y=8, and z=12 find w ...