Question

if x and y vary inversely and x=25 when ,y = 3.find y,when x =15​

Answer 1

x = 25 15

y = 3 y

x and y vary inversely.

xy = k

25 × 3 = 15 × y

25 × 3/ 15 = y

25 / 5 = y

5 = y

Therefore y is 5