Mathematics, 27.08.2019 23:30 Amari1010

If y varies inversely as x and y = 27 when x = 12 , find x when y = - 9 .

Answers

Answer from: jack104365

x = - 36

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 = 27 when x = 12, then

k = yx = 27 × 12 = 324, thus

y = $\frac{324}{x}$ ← is the equation of variation

When y = - 9, then

- 9 = $\frac{324}{x}$ ( multiply both sides by x )

- 9x = 324 ( divide both sides by - 9 )

x = - 36

Answer from: Quest

in 4 days he will run 12/14

step-by-step explanation:

Answer from: Quest

76%

step-by-step explanation:

24% are dogs and the remaining is 76% because 100-24=76

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If y varies inversely as x and y = 27 when x = 12 , find x when y = - 9 ....