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Vedmedyk [2.9K]
4 years ago
9

If x varies directly as y, and x=4 when y=15, find x when y=36.​

Mathematics
1 answer:
vesna_86 [32]4 years ago
7 0

Answer:

x = 9.6

Step-by-step explanation:

Given that x varies directly as y then the equation relating them is

x = ky ← k is the constant of variation

To find k use the condition x = 4 when y = 15

k = \frac{x}{y} = \frac{4}{15}

x = \frac{4}{15} y ← equation of variation

When y = 36, then

x = \frac{4}{15} × 36 = \frac{144}{15} = 9.6

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