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3 years ago

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

Mathematics

1 answer:

alexgriva [62]3 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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3 years ago

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Answer:

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Step-by-step explanation:

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<img src="https://tex.z-dn.net/?f=%2832%29%5E%7B1%2F5%7D" id="TexFormula1" title="(32)^{1/5}" alt="(32)^{1/5}" align="absmiddle"

lorasvet [3.4K]

Answer:

Step-by-step explanation:

${32}^{ \frac{1}{5} }$

$= \sqrt[5]{32}$

$= \sqrt[5]{2 \times 2 \times 2 \times 2 \times 2}$

= 2 (Ans)

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3 years ago