SOLUTION: Jim's average score on three tests is 82. What is the least he can score on his fourth test so that his average will be at least 86?

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Question 222722: Jim's average score on three tests is 82. What is the least he can score on his fourth test so that his average will be at least 86?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
Jim's average score on three tests is 82.
What is the least he can score on his fourth test so that his average will be at least 86?
:
Let x = the score on the 4th test
:
%28%283%2A82%29%2Bx%29%2F4 = 86
:
%28246%2Bx%29%2F4 = 86
Multiply both sides by 4
246 + x = 4(86)
:
246 + x = 344
:
x = 344 - 246
:
x = 98 for his average to be 86
:
:
Check on calc (3(82)+98)/4 = 86