"Hello mom, how are you?"
Translation:שלום אמא, מה שלומך?
I'm confused. I thought ma shlomekh was used when speaking to men, but the exercise said both ma shlomekh and ma shalomkha were right. Have I misunderstood?
It is the exact opposite. Ma shlomech is used when speaking to a woman, and ma shlomcha when speaking to a man.