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DerKrebs [107]
3 years ago
15

If y varies directly as x and y=3 when x=2 find y when x=8​

Mathematics
2 answers:
goldfiish [28.3K]3 years ago
8 0

Answer:

y = 12 when x = 8

Step-by-step explanation:

This is a case of direct variation, and the pertinent equation is y = kx.

Substituting 2 for x and 3 for y, we get:  3 = 2k.  Then k = 3/2  is the constant of proportionality.

Then y = (3/2)x.

When x = 8, y = (3/2)(8) = 12

satela [25.4K]3 years ago
6 0

Answer:

12

Step-by-step explanation:

x=2 was multiplied by 4 to get to x=8 so you multiply y=3 by 4 to make it y=12

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