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Bra1nPowers
20.09.2019 •
Mathematics
In 36 years, amy will be 3 times as old as she is right now. how old is she now?
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Ответ:
Ответ:
When x = 7, y = -2
Step-by-step explanation:
According to question,
y ∝ 1 / x
To remove proportionality, include a constant. Let the constant be k.
y = k × (1 / x)
Now, we know that y = 7 when x = -2
y = k × (1 / x)
7 = k × (1 / -2)
k = -14
The equation now becomes,
y = -14 × (1 / x)
Now, we need to find y when x = 7.
y = -14 × (1 / 7)
y = -2
So, when x = 7, y = -2.