SOLUTION: i have an 83 in math right now, and my final is worth 15 percent of my overall grade. what do i need to make in order to make an A (90 or above) in that class for the semester

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Question 932359: i have an 83 in math right now, and my final is worth 15 percent of my overall grade. what do i need to make in order to make an A (90 or above) in that class for the semester
Answer by jim_thompson5910(35256) (Show Source):
You can put this solution on YOUR website!
Your final is worth 15% of your grade. So 100-15 = 85% of your grade is for the remainder of the assignments and other stuff.

Let x = score on the final (score in decimal form)

0.83*0.85 + 0.15x = 0.90

0.7055 + 0.15x = 0.90

0.15x = 0.90-0.7055

0.15x = 0.1945

x = 0.1945/0.15

x = 1.2966666

Multiply by 100 to get 100*1.2966666 = 129.66666%. It is not possible to get a score of 129.67% on the final.

So it is not possible to go from an 83% overall grade to a 90% overall grade.

If you got 100% on the final, then 0.83*0.85 + 0.15*1 = 0.8555 so the best you can get is 85.56%

Note: the teacher may drop lowest scores or add more extra credit in some way, so it's always best to ask the teacher. My answer gives you a ballpark idea but the teacher will know better than me (since it's their own personal grading system, they can do whatever they want).