Sunday

March 29, 2015

March 29, 2015

Posted by **CC** on Wednesday, July 6, 2011 at 10:42pm.

If y varies inversly as the 4th power of x and y=3 when x=2, what is y when x=0.5?

If Q varies inversly as the sqaure root of R and Q=2 whe R=4, what is Q when R is 25?

- Algebra 2 -
**Reiny**, Wednesday, July 6, 2011 at 10:58pm1st one:

y = k(1/x^4)

when x=2, y=3

3 = k(1/16) ---> k = 48

equation: y = 48/x^4

when y = .5

.5 = 48/x^4

x^4 = 96

y = 96^(1/4) = 2(6^(1/4) or appr. 3.13

you try the second one, using the same method

Start with

Q = k/√R

- Algebra 2 -
**CC**, Thursday, July 7, 2011 at 12:42pmis the second one R=625?

**Answer this Question**

**Related Questions**

college algebra - u varies inversly as n

Chemistry-check answers - The volume V of a gas varies inversly as pressure P is...

Math - Write an equation: x varies directly as y and inversly directly to the ...

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

math - a variable y varies directly as the square root of a varies x,and equals ...

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

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

precalculus - the variable j varies jointly as the square of h and as the cube ...

Math102 - If x varies directly as y and y varies inversely as the square of z. ...

Inverse Variation - Help me please.. Explain also :( 1. E is inversely ...