Speaking as a mom, I don't see that happening. It's in our nature to worry, get upset, and generally make our kids wonder if we're crazy or what! Hopefully your mom won't get mad at you, but encourage you to do better. She may offer to help you study. If possible, when you give her the bad grade, tell her about any problems you are having with the class & let her know you're upset, too and you want to work to improve your grade (we love that stuff!) Best of luck to you!
Sweet it's your mom she only gets mad because she wants you to do good and that she feels she failed to help you you have nothing to fear just say mom I got a bad grade show her and then accept the punishment and then work your hardest to bring it up make her proud don't fear her
You should probably show her but before she says anything tell her how you are going to try harder to raise your marks. i swear to god, it really works, she will probably be happy to know you are going to try and fix it rather then just leaving it. education is really important and you need it if you want to get somewhere really good in life and actually have a average living!
She'll be upset. You can't get around that. Maybe if you stopped worrying about your pierced cartilage, and your acrylic nails, and your blue hair and started concentrating on your studies, you would not be in this mess. It's not too late to turn it around and make your mom and yourself proud.