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ololo11 [35]
2 years ago
13

Find an equation of variation in which y varies inversely as x and y=5 and x=21. Then find the value of y when x=10.

Mathematics
1 answer:
finlep [7]2 years ago
7 0

Answer:

see explanation

Step-by-step explanation:

Given that y varies inversely as x then the equation relating them is

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

To find k use the condition y = 5 , x = 21

k = yx = 5 × 21 = 105

y = \frac{105}{x} ← equation of variation

When x = 10, then

y = \frac{105}{10} = 10.5

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