Question

If y varies inversely as the square of x and y=4 when x=5, what is y when x is 2?

Answer 1

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Answer 2

y=k*1/x^2

case 1-:

y=4 x=5

4=k*1/25

100=k

case 2-:

x=2 y=?

y=100*1/4

y =25 (ans)