Mathematics, 05.03.2021 22:10, cait0820

En un examen tipo test de 30 preguntas, Ariadna ha obtenido 54 puntos. Las preguntas contestadas correctamente valen 3 puntos, mientras que las no contestadas o erróneas descuentan 1 punto. ¿Cuántas preguntas del test ha contestado correctamente Ariadna? Plantea y resuelve un sistema de ecuaciones para solucionar el problema.

18 preguntas.

19 preguntas.

20 preguntas.

21 preguntas.

Answers: 2

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En un examen tipo test de 30 preguntas, Ariadna ha obtenido 54 puntos. Las preguntas contestadas cor...