SOLUTION: Sam must have an average of 70 or more in his summer course to obtain a grade of C. His first three test grades were 75,63, and 68. Write an inequality representing the score

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Question 47590This question is from textbook Beginning Algebra
: Sam must have an average of 70 or more in his summer course to obtain a grade of C. His first three test grades were 75,63, and 68.
Write an inequality representing the score that Sam must get on the last test to get a C grade.



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 This question is from textbook Beginning Algebra

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Sam must have an average of 70 or more in his summer course to obtain a grade of C. His first three test grades were 75,63, and 68.
Write an inequality representing the score that Sam must get on the last test to get a C grade.
Let "x" be the minimum score Sam needs to make the 70 average.
EQUATION:
(75+63+68+x)/4>=70
206+x>=280
x>=74
Sam needs a score of at least 74 to achieve an average of 70 on the 4 tests.
Cheers,
Stan H.