Final answer:
The sentence 'Tengo unas maestras buenas' is incorrect as written. To correct it, we need to change 'maestras' to 'maestros' and 'buenas' to 'buenos'.
Step-by-step explanation:
The sentence 'Tengo unas maestras buenas' is incorrect as written. To correct it, we need to change 'maestras' to 'maestros' and 'buenas' to 'buenos' to agree in gender and number with the masculine noun 'maestros'.
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