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19.03.2021 •
Mathematics
Numa confeitaria as amêndoas de Páscoa são vendidas a 25 €/kg acrescido de 1,50 €, que é o custo da embalagem. Seja f a função que a cada (a), quantidade de amêndoas, em quilogramas, faz corresponder, em euros, o preço total, incluindo a embalagem. A D. Lurdes comprou amêndoas e pagou com uma nota de 20 €, tendo recebido de troco 2 €. Qual foi a quantidade de amêndoas que comprou. *
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