If y is 2.5 when x is 5 and y varies directly with x, find y when x is 10. 5 7.5 12.5 20
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Updated 4/13/2014 9:55:08 PM
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User: If y is 2.5 when x is 5 and y varies directly with x, find y when x is 10. 5 7.5 12.5 20

Weegy: If y is 5 when x is 2.5 and y varies directly with x. When x = 10, y = ? 5/2.5 = y/10; y = 50/2.5; y = 20;
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Question
Updated 4/13/2014 9:55:08 PM
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y varies directly with x, then y = kx
y is 2.5 when x is 5, k = y/x = 2.5/5 = 0.5
The equation is y = 0.5x
when x = 10,
y = 0.5(10) = 5
Confirmed by jeifunk [4/13/2014 10:01:06 PM]

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