pinapunapula
05.03.2021 •
Mathematics
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.
Solved
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