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

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

User Evolon
by
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1 Answer

6 votes
z = nx²

50 = n5²

n = 50/5² = 50/25 = 2

z = 2x²
User Bred
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