SOLUTION: Can someone please help me on this problem? 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 6

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Question 53947: Can someone please help me on this problem?
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. I need to write an inequality representing the score that Sam must get on the last test to get a C grade.
Thanks,
Lyn
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. I need to write an inequality representing the score that Sam must get on the last test to get a C grade.
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Let "x" be his score on the 4th test.
INEQUALITY
The average of the 4 tests must be >= 70
(75+63+68+x)/4 >=70
(206+x)>=280
x>=74
His 4th test must be passed at a score of 74 or greater.
Cheers,
Stan H.