Y varies inversely with x. When x = 3 then y = 5. Find the value of x when y = 21

Mathematics

1 answer:

alexgriva [62]2 years ago

7 0

Answer:

y=1/x
y=k/x
k=yx
given x=3,y=5
k=5×3=15
when y=21
x=k/y
x=15/21=0.7143ans

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