SOLUTION: If I have an 80% in a class, what is the lowest score I can get on the final that is worth 30% of our grade to keep at least an 80%?

Question 874185: If I have an 80% in a class, what is the lowest score I can get on the final that is worth 30% of our grade to keep at least an 80%?
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
(weight of other classwork)*(score on other classwork) + (weight of final)*(score on final) = (Final Grade)

(0.70)*(0.80) + (0.30)*(x) = (0.80)

0.56 + 0.30x = 0.80

0.30x = 0.80 - 0.56

0.30x = 0.24

x = 0.24/0.30

x = 24/30

x = 4/5

x = 0.8

So you need to get at least an 80% on the final to get an overall grade of 80% or higher. This is assuming the grade isn't curved or anything.
RELATED QUESTIONS
[ I have a 83% in my statistics class and our final is worth 25% of our grade. What do I... (answered by TimothyLamb)

80% of my grade is an 84. The final is worth 30% of our grade. What is the LOWEST score I (answered by JulietG)

If I have a 95% in a class and my final is worth 20% what is the lowest grade I can get... (answered by Alan3354)

If I have an 80 in the class and the final exam is worth 15% what is the lowest grade I... (answered by stanbon,dragonwalker)

if I have an 80% in my math class, and the final is worth 25% of my grade. what do I need (answered by TimothyLamb)

if my grade is a 77.20 and i have to take a final that is worth 30% of my grade what is... (answered by Alan3354)

If I have a 74% in my class and my final coming up is worth 25% of my grade, what is the... (answered by josmiceli)

If I have an 85% in a class and the final is worth 10% what is the lowest grade I can get (answered by Fombitz)

if i have an 94.93% in the class and my final is worth 20% what do i have to score to... (answered by AnlytcPhil)