SOLUTION: Shelia has grades 75,80,and 82.What grade must she earn on her next test to get an average of 82 for the four tests?

Algebra ->  Average -> SOLUTION: Shelia has grades 75,80,and 82.What grade must she earn on her next test to get an average of 82 for the four tests?      Log On


   

Question 954550: Shelia has grades 75,80,and 82.What grade must she earn on her next test to get an average of 82 for the four tests?
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
%28%22sum_of_grades%22%29%2F4+=+average


%2875%2B80%2B82%2Bx%29%2F4+=+82


75%2B80%2B82%2Bx+=+82%2A4


75%2B80%2B82%2Bx+=+328


237%2Bx+=+328


x+=+328-237


x+=+91


Sheila must get a 91 on the fourth test to get an average of 82 overall.

------------------------------------------------------------------------------------------------------------------------

If you need more one-on-one help, email me at jim_thompson5910@hotmail.com. You can ask me a few more questions for free, but afterwards, I would charge you ($2 a problem to have steps shown or $1 a problem for answer only).

Alternatively, please consider visiting my website: http://www.freewebs.com/jimthompson5910/home.html and making a donation. Any amount is greatly appreciated as it helps me a lot. This donation is to support free tutoring. Thank you.

Jim
------------------------------------------------------------------------------------------------------------------------