valeriemgrant valeriemgrant
  • 18-12-2018
  • Mathematics
contestada

the variables y and x have a proportinal relationship and y=12 when x=5 . what is the value of y when x=8?

Respuesta :

jimrgrant1 jimrgrant1
  • 18-12-2018

Answer:

y = [tex]\frac{96}{5}[/tex]

Step-by-step explanation:

given that y and x are proportional then the equation relating them is

y = kx ← k is the constant of proportionality

to find k use the given condition y = 12 when x = 5

k = [tex]\frac{y}{x}[/tex] = [tex]\frac{12}{5}[/tex]

y = [tex]\frac{12}{5}[/tex] x ← equation of proportionality

when x = 8, then

y = [tex]\frac{12}{5}[/tex] × 8 = [tex]\frac{96}{5}[/tex]


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