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      Question

      A varies directly as (B + 18) and A = 108 when B = 36.

      Find the value of A when B = 68.
      A 75 Correct Answer Incorrect Answer
      B 86 Correct Answer Incorrect Answer
      C 127 Correct Answer Incorrect Answer
      D 172 Correct Answer Incorrect Answer

      Solution

      A = k (B + 18) 108 = k (36 + 18) k = 108/54 ย  = 2 A = 2x (68+ 18) =2 x 86 = 172

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