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 that

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Question 103363: 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.
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.
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Let his final test result be "x".
EQUATION:
(75+63+68+x)/4 >= 70
(206+x) >= 280
x >= 74
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Cheers,
Stan H.