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The value of y varies directly with x. If x = 3, then y = 21. What is the value of x when y = 105? F لا | 1 1 3 H 7 J 15​

Respuesta :

mhanifa

Answer:

  • J. 15

Step-by-step explanation:

Direct variation formula:

  • y = kx, k- coefficient of proportionality

Given:

  • x = 3,
  • y = 21

Find k:

  • 21 = 3k
  • k = 7

Value of x, when y = 105

  • 105 = 7x
  • x = 105/7
  • x = 15

Correct choice is the last one

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