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A quantity, y, varies directly as x. When y = 9, x = 4. Find y when x = 10

A quantity, y, varies directly as x. When y = 9, x = 4. Find y when x = 10
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2 votes
A quantity, y, varies directly as x. When y = 9, x = 4. Find y when x = 10

asked
User YKY
by
8.4k points

1 Answer

4 votes
y = kx

9 = k4

k = (9/4)

y = (9/4)x

when x=10,

y = (9/4)10
y = 22.5
answered
User Glaud
by
8.8k points
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