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alexandr402 [8]
4 years ago
6

The variable is directly proportional to the variable . If y = 10 when x = 6, what is the value of y when x = 15?

Mathematics
1 answer:
PSYCHO15rus [73]4 years ago
7 0

Answer:

y = 25

Step-by-step explanation:

Given that the quantities are proportional then the equation relating them is

y = kx ← k is the constant of proportion

To find k use the condition y = 10 when x = 6

k = \frac{y}{x} = \frac{10}{6} = \frac{5}{3}

y = \frac{5}{3} x ← equation of proportion

When x = 15, then

y = \frac{5}{3} × 15 = 5 × 5 = 25

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