sampete03 sampete03
  • 20-08-2020
  • Mathematics
contestada

If y varies inversely as x, and y = 14 when x = 8, find y when x = 7.

Respuesta :

jimrgrant1 jimrgrant1
  • 20-08-2020

Answer:

y = 16

Step-by-step explanation:

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

y = [tex]\frac{k}{x}[/tex]

To find k use the condition y = 14 when x = 8, thus

14 = [tex]\frac{k}{8}[/tex] ( multiply both sides by 8 )

112 = k

y = [tex]\frac{112}{x}[/tex] ← equation of variation

When x = 7, then

y = [tex]\frac{112}{7}[/tex] = 16

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