Asked by Vesper
Use k = y
x
and y = kx
Suppose y varies directly
as x, and y=4 when x=5.
Find x when y=6.
x
and y = kx
Suppose y varies directly
as x, and y=4 when x=5.
Find x when y=6.
Answers
Answered by
mathhelper
I will assume your question is simply:
Suppose y varies directly as x,
and y=4 when x=5.
Find x when y=6.
y = kx
when y=4, x=5
4 = 5k
k = 4/5
so y = 4/5 x
when y = 6
6 = 4/5 x
30 = 4x
x = 30/4 = 15/2
Suppose y varies directly as x,
and y=4 when x=5.
Find x when y=6.
y = kx
when y=4, x=5
4 = 5k
k = 4/5
so y = 4/5 x
when y = 6
6 = 4/5 x
30 = 4x
x = 30/4 = 15/2
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