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19-11-2020
Mathematics

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2. The value of y varies directly with x. When y = 45, x = 4. What is the
value of y when x is 7?

2 The value of y varies directly with x When y 45 x 4 What is the value of y when x is 7 class=

Respuesta :

19-11-2020

Answer:

direct variation means y=kx (inverse variation is yx=k or y=k/x)

so we are given that:

75=k/2, so k=150 which means:

y=150x now

y(2.25)=150(2.25)=337.5

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