SOLUTION: John's average in mathematics is now 80 and he has one final test left to take that will count 10% of his grade. What is the minimum score must he get on his final in order to aver

Question 951494: John's average in mathematics is now 80 and he has one final test left to take that will count 10% of his grade. What is the minimum score must he get on his final in order to average at least 82 for the entire course?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
John's average in mathematics is now 80 and he has one final test left to take that will count 10% of his grade.
What is the minimum score must he get on his final in order to average at least 82 for the entire course?
:
let x = the score required on his final to get an 82 average
= 82
multiply by 10, to clear the denominator
720 + x = 820
x = 820 - 720
x = 100% he has to get to average an 82

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