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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

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User Evolon
by
8.3k points

1 Answer

6 votes
z = nx²

50 = n5²

n = 50/5² = 50/25 = 2

z = 2x²
answered
User Bred
by
9.0k points
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