HELP I need to calculate the minimum scores needed on my 3 exams and final exam to pass with a 70%!

Question

I'm taking a class with homework worth 10% of my grade, quizzes worth 25%, exams worth 40%, and a final exam worth 25%. If I finish 100% of my homework, get 50% of the quizzes right, and scored a 60% on the first test, what are the minimum scores I need on the other 3 exams and final exam to pass with a 70%? I currently have a 72%. Sorry if this is a little too wordy I just don't know how to go about solving this!

Answer 1

If you have only 50% and they count 25% of you final grade, that's only 12.5 toward your total grade.  Getting 100% on your homework gets you only 10.  You got a 60 on one exam, that only counts 10% of your total grade, so that only counts 6.  That's only 28.5 toward your final grade if you add what you did so far.  So, the way it works out, the equation you need, we need to introduce variables first:

 

A = first exam

B = second exam

C = third exam

D = final exam

here is your equation so far:  28.5 + 0.1 * (A + B + C) + 0.25 * D = ? (You could give this a value of 70 and guess 3 of the variables to find the other one).

For example, if you get an average of 75 on the next 3 tests, you need a 76 for the final exam. 

Increasing your quiz score will also help you.

 

By the way, A, B, C, and D represent 55% of your total grade. (10 + 10 + 10 + 25) %

Good luck!  And don't give up!!!!!