SOLUTION: if y=7.2 when x=10, what is the calue of x when y=20? (y caries inversely as the square of x)

Algebra ->  Complex Numbers Imaginary Numbers Solvers and Lesson -> SOLUTION: if y=7.2 when x=10, what is the calue of x when y=20? (y caries inversely as the square of x)      Log On


   

Question 175172: if y=7.2 when x=10, what is the calue of x when y=20? (y caries inversely as the square of x)
Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
yx%5E2=k 7.2(10^2)=k=720
:
20x%5E2=720
:
x%5E2=36
:
highlight%28x=6%29