paramedic424 paramedic424
  • 07-09-2020
  • Mathematics
contestada

Suppose y varies inversely with x, and y = 25 when x = 1/5. What is the value of y when x = 5 ?

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jimrgrant1 jimrgrant1
  • 07-09-2020

Answer:

y = 1

Step-by-step explanation:

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

y = [tex]\frac{k}{x}[/tex] ← k is the constant of variation

To find k use the condition y = 25 when x = [tex]\frac{1}{5}[/tex] , then

25 = [tex]\frac{k}{\frac{1}{5} }[/tex] = 5k ( divide both sides by 5 )

5 = k

y = [tex]\frac{5}{x}[/tex] ← equation of variation

When x = 5, then

y = [tex]\frac{5}{5}[/tex] = 1

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