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3 years ago

If y varies inversely as x, and x= 8 when y = 4, find y when x = 2

Mathematics

2 answers:

VMariaS [17]3 years ago

8 0

Answer:

y = 16

Step-by-step explanation:

Use the inverse variation equation, y = $\frac{k}{x}$

Plug in 8 as x and 4 as y, then solve for k

y = $\frac{k}{x}$

4 = $\frac{k}{8}$

32 = k

So, k is 32.

The equation is y = $\frac{32}{x}$

Plug in 2 as x and solve for y

y = $\frac{32}{x}$

y = $\frac{32}{2}$

y = 16

So, when x = 2, y = 16

VladimirAG [237]3 years ago

4 0

Answer:

I'm pretty sure that it is 8 but I'm not entirely sure

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