SOLUTION: 92. 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 40713: 92. 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 much get on the last test to get a C grade.
Found 2 solutions by checkley71, Earlsdon:
Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
(75+63+68+X)/4=70 OR (206+X)/4=70 OR 206+X=280 OR X=74

Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
Sam's average score, including the score of x on his last test must be at least 70.(70 or more)
The average (mean) is found by adding the four scores and dividing the sum by 4, and this must be 70 or more.
%2875%2B63%2B68%2Bx%29%2F4+%3E=+70
%28206%2Bx%29%2F4+%3E=+70 Multiply both sides by 4.
206%2Bx+%3E=+280 Subtract 206 from both sides.
x+%3E=+74 This is the inequality representing the score that Sam must get on the last test.