Question

My final is worth 25% of my grade. I have a 79 now. What is the minimum score I can make to get a B in the class? And an A?

Answer 1

is this a real question or is this your grade?? Either way:
if 75% of you grade is a 79 and you still have 25% to complete

75% of 79 + 25% of Final = Grade
so if you want a B, which I believe is a 83:
0.75*79+0.25*F = 83;
0.25*F = 23.75
F = 95;

if you want an A, which is a 93 (I think)
0.75*79+0.25*F = 93
F = 135;

so to get a B you need to get a 95 on your final, and to get an A in the class you need a 135.