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jonny [76]
3 years ago
14

The variable Z is inversely proportional to X. When X is 3, Z has the value 6.3333333333333. What is the value of Z when X = 8 R

ound to at least the thousandths place if needed.
Mathematics
1 answer:
sveta [45]3 years ago
8 0
Inverse variation is of the form y=k/x or if you prefer yx=k.

z=6.3 bar  I assume you mean 6.33333333 forever

10z-z=63.3333...-6.3333

9z=57

z=57/9  (exact)

Now back to the problem...

xz=k, we are told x=3 and we have shown z=57/9 so we can solve for k, the constant of variation

k=3(57/9)=19

So our equation is:

xz=19, now we wish to know what z is when x=8 so

8z=19  divide both sides by 8

z=19/8  

z=2.375  (exact, no rounding necessary)
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