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If z is directly proprotional to x and z = 12 when x = 3, find the value of x when z = 18

User Likle
by
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1 Answer

6 votes

Answer:

  • 4.5

Explanation:

z is directly proportional to x

  • z = kx, where k is coefficient

If z = 12 when x = 3

Then we have

  • 12 = 3k
  • k = 4

So the coefficient is 4

When z = 18, we have

  • 18 = 4x
  • x = 18/4
  • x = 4.5
User Sam Houston
by
8.7k points

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