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Artyom0805 [142]
3 years ago
10

If x varies inversely as y, and x = 11 when y = 15, find x when y = 3.

Mathematics
2 answers:
sattari [20]3 years ago
7 0

Answer:

C

Step-by-step explanation:

given x varies inversely as y then the equation relating them is

x = \frac{k}{y} ← k is the constant of variation

To find k use the given condition x = 11 when y = 15

k = xy = 11 × 15 = 165 , hence

x = \frac{165}{y} ← inverse variation equation

when y = 3, then

x = \frac{165}{3} - 55 → C


Firlakuza [10]3 years ago
5 0

Answer:

55

Step-by-step explanation:

The equation of inverse variation is

y = k/x,

where k is a constant.

We can use the given x- and y-coordinates to find k.

y = k/x

15 = k/11

k = 165

The inverse variation equation for this problem is

y = 165/x

For y = 3,

3 = 165/x

3x = 165

x = 55


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Add 2 and 9 to get 11.

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aksik [14]

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E. increases; shifts the AD curve rightward

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4 years ago
P varies directly with the square of R. When R is 4, P is 56. Find the value of P when R is 6
Sav [38]
Hey!
The formula of direct variation is y = kx. So we know that p = kr^2
Hint: after it says varies, it's basically the equal sign. 
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56 = 4^2k
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6 0
3 years ago
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gavmur [86]

Answer:

Yes.

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Step-by-step explanation:

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So there are no duplicate points.

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The relation is a function because there is no x that gets mapped to more than one y.

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3 years ago
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