need help, stressing out about passing finite math aka business pre calc?

[Cam]

i just need this math class to get my degree, and we are doing review on algebra and im already struggling. im having trouble remembering formulas and looked at the schedule it appears alot of the work in the class is on functions, quadratic functions, linear functions, graphs, and matrices. im freaked out im not gonna pass cuz i barely remember the stuff i did in algebra, any tips?? i cant retake algebra either i took it ins ummer and parents wont pay to retake it