SOLUTION: You score a 82 and 86 on the first 2 tests in your math class. You would like for your average after 3 tests to be at least a 90. Assuming that each test is worth 100 points. Is

Question 902739: You score a 82 and 86 on the first 2 tests in your math class. You would like for your average after 3 tests to be at least a 90. Assuming that each test is worth 100 points. Is this possible? If not, why not? If yes, what score must you make to have at least a 90 average. I'm not very sure how to do this problem.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
You score a 82 and 86 on the first 2 tests in your math class. You would like for your average after 3 tests to be at least a 90. Assuming that each test is worth 100 points. Is this possible? If not, why not? If yes, what score must you make to have at least a 90 average.
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Let the 3rd test score be "x".
Equation:
(82+86+x)/3 >= 90
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(168+x) = 270
x = 270-168
x = 102
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Ans: Impossible because you cannot get a score of 102 on the 3rd test.
Cheers,
Stan H.
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