If she’s having difficulties with this level of mathematics, does it really matter if she fails the class?
It might pay to determine what’s necessary for a passing grade and be done with it. It’s hard to believe that wouldn’t be possible.
If you’re willing to invest time, help her pass during these next 4 months. It could be the best educational experience she ever gets.
I won’t be of much help, the math teacher willing to help for free can’t do it until summer (she teaches and coaches). The school offered the name of a tutor at $45/hr, which the mother cannot afford. The actual teacher of the course has offered to stay after two days a week with her (30 minutes x 2) (and with whoever else shows up for help) but has told her it’s just going to get harder from here on out, as she needs to learn the whole first semester while the class proceeds with harder material. I’m not saying passing is impossible but it looks grim.
If her grade half way through the course is ~30, she would need 100 in the second half just to get a 65 for the course. I don't know about this school but at my high school 70 was passing. Even if passing is 60 it seems unlikely that she could get a 90 for the rest of the course.