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8_murik_8 [283]
3 years ago
15

10. Suppose that y varies directly with x. When y is 12, x is -3. What is y when x is 4?

Mathematics
1 answer:
Rzqust [24]3 years ago
4 0

Answer:

y = -16

Step-by-step explanation:

Given that,

y varies directly with x. Mathematically, we can write it as follows :

y\propto x

or

y=kx

Where

k is constant

Put y = 12 and x = -3 to find k. So,

k=\dfrac{y}{x}\\\\k=\dfrac{12}{-3}\\\\k=-4

Now put k = -4 and x = 4. So,

y=-4\times 4\\\\=-16

So, the required value of y is equal to -16.

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