dcerda dcerda
  • 18-04-2017
  • Mathematics
contestada

z varies directly as x^2. if z=50 when x=5, find z when x=7

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Аноним Аноним
  • 18-04-2017
z = nx²

50 = n5²

n = 50/5² = 50/25 = 2

z = 2x²
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