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14 October, 18:54

Using the formula P = 2 (a + b), find a when P = 15 and b = 5.

1) 2.5

2) 5

3) 8

4) 10

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Answers (1)
  1. 14 October, 22:01
    0
    P = 2 (a + b)

    P = 15, and b = 5.

    15 = 2 (a + 5)

    15 = 2a + 10

    5 = 2a

    a = 5/2 = 2 1/2 = 2.5
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