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Mathematics
Aspen Leach
27 February, 10:49
If y=-4 when x=10 find y when x=2
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Lauryn Howell
27 February, 11:55
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X = y x z
10 = (-4) x z
Z = - 10/4 = - 5/2
So now we know z = - 5/2
we can find y when x = 2
Again x = y x z
2 = y x (-5/2)
So y = 2 x (-2/5) = - 4/5
Double check:
x = yx (x = 2, y = - 4/5), z = - 5/2)
2 = (-4/5) x (-5/2) = 20/10 = 2
Answer: when x = 2, y = - 4/5
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