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9 September, 07:40

En un huerto se siembra frijol. Si se pone una planta, produce 3kg de frijol. por cada planta extra que se ponga, todas las plantas producen 70g menos. Encuentra una fórmula que exprese la producción según las plantas que hay, y simplifícala de la forma ax 2 + bx+c

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  1. 9 September, 08:00
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    y = - 0.07x2 + 3.07x

    Step-by-step explanation:

    For each plant we add, there is a decrease of 70 grams for all plants from the inicial value of 3 kg of beans.

    So, for 2 plants, we have (3 - 0.07) * 2

    For 3 plants, we have (3 - 2*0.07) * 3

    For x plants, we have (3 - (x-1) * 0.07) * x

    So we can model the final result of the amount of beans 'y' with the equation:

    y = (3 - (x-1) * 0.07) * x

    y = (3 - 0.07x + 0.07) * x

    y = (3.07 - 0.07x) * x

    y = - 0.07x2 + 3.07x

    (In this equation we have a = - 0.07, b = 3.07 and c = 0)
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