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11 July, 19:14

What is the value of y in the equation 6.4x + 2.8y = 44.4, when x = 3? y = 5 y = 6 y = 8 y = 9

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Answers (2)
  1. 11 July, 19:38
    0
    y=9

    Step-by-step explanation:

    6.4x + 2.8y = 44.4

    x=3, y=?

    6.4*3+2.8y = 44.4 2.8y = 44.4 - 19.2 2.8y = 25.2 y = 25.2/2.8 y = 9
  2. 11 July, 22:14
    0
    9

    Step-by-step explanation:

    6.4x + 2.8y = 44.4

    x=3, substituting it in the expression above we have:

    6.4 (3) + 2.8y = 44.4

    19.2 + 2.8y = 44.4

    2.8y = 44.4 - 19.2 = 25.2

    y = 25.2 / 2.8 = 9
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