Home life: drama. Please help?

I am 15 years old and I have been living here since I was 10. I am so tired of being yelled at and stuff thrown at constantly and being called bitc*s and liers. I hate it! She keeps saying pack your bags and recently I did just that but she would not let me go. As soon as I get up in the morning ...."Get your lazy a** up you good for nothing b****" I don't say anything back just to avoid more drama. I am hit on a regular basis also. I hate it here. Oh and I am adopted, my dad is dead and i don't know where my mom is. What can I do?