Will I pass this or fail miserably?

Ok, so my algebra final is tomorrow, and our teacher is splitting it up into 150 questions, half tomorrow and half the next day. I don't do very well in math, and have never really ever done well in the subject alone.

My averages/semester grades are:

1: 76
2: 83
3: 80
4: 71

My mom told me if I pass this class with AT LEAST a C she'll get me an iPhone, which I've wanted for about 5 years now. I just need to know: A. What are my chances? B. What score would be sufficient in order to pass with a C? C. How much will my grade go down if I score a 50 or lower?

Right now you doing every good i think you have a good chance because 60-69 is a C 70-79-is a B
and 80-100 is a A over all your whole average is 77.5 wich is a B+ so you even you would have to get a least a C to get a phone you should study alot

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