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31 December, 21:17

Given that R = 8 x + 4 y Find y when x = 8 and R = 30 Give your answer as an improper fraction in its simplest form.

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  1. 31 December, 21:40
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    y = - 17/2

    Step-by-step explanation:

    Substitute with the givens.

    30 = 8 (8) + 4y.

    Multiply parentheses.

    30 = 64 + 4y

    Subtract.

    30-64 = - 34

    -34 = 4y.

    Divide each side by 4.

    y = - 8.5, or - 17/2

    hope that is right!
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