Nominative (rafʿ): مُسْلِمَاتٌ — ḍamma (here with tanwīn).
Accusative (naṣb): مُسْلِمَاتٍ — kasra (here with tanwīn).
Genitive (jarr): مُسْلِمَاتٍ — kasra (here with tanwīn).
Accusative and genitive are distinct cases even when their visible ending is identical. The governor and the sentence structure identify the case.