SOLUTION: If I have a 47% in my math class and I need a 55% to pass, and my exam is worth 30% of my overall grade, what do I need to get on the exam to pass my math class? Please Help!

Question 927197: If I have a 47% in my math class and I need a 55% to pass, and my exam is worth 30% of my overall grade, what do I need to get on the exam to pass my math class?
Please Help!
Thank you,
Taylor Honer
Found 2 solutions by TimothyLamb, stanbon:
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
since the final exam is worth 30% we can assume that the class work up to the final is worth 70%
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0.7*47 + 0.3x = 1.0*55
32.9 + 0.3x = 55
0.3x = 55 - 32.9
x = (55 - 32.9)/0.3
x = 73.7
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you need 74 on the final
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Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
If I have a 47% in my math class and I need a 55% to pass, and my exam is worth 30% of my overall grade, what do I need to get on the exam to pass my math class?
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You have 0.47*70 = 32.9 points
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To pass you need 55 of 100 points
So you need to earn 55-32.9 = 22.1 points on the last test
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The last test is worth 30 points
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You need 30x = 22 where x is the fraction of 30 you need to get 22.
x = 22/30 = 73.3% on the final exam
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Cheers,
Stan H.
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30x =

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