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vlabodo [156]
2 years ago
5

Y varies inversely with x if y = 7 when x =-4, find y when x = 5​

Mathematics
1 answer:
marysya [2.9K]2 years ago
3 0

Answer:

y = - \frac{28}{5}

Step-by-step explanation:

Given y varies inversely with x then the equation relating them is

y = \frac{k}{x} ← k is the constant of variation

To find k use the condition y = 7 when x = - 4, then

7 = \frac{k}{-4} ( multiply both sides by - 4 )

- 28 = k

y = \frac{-28}{x} ← equation of variation

When x = 5 , then

y = \frac{-28}{5} = - \frac{28}{5}

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