document.write( "Question 378119: Use Interval notation to express the range..\r
\n" ); document.write( "\n" ); document.write( "On the first of four exams, your grades are 78, 86, 69 and 79. You are hoping to earn a C in the course. this will occur if the average of your five exam grades is greater than or equal to a 70 and less than an 80. What range of grades on the fifth exam will result in earning a C?
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Algebra.Com's Answer #268683 by Fombitz(32388)\"\" \"About 
You can put this solution on YOUR website!
Aim for the middle?
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\n" ); document.write( "The average is equal to,
\n" ); document.write( "\"A=%2878%2B86%2B69%2B79%2BX%29%2F5\"
\n" ); document.write( "where X is the final grade.
\n" ); document.write( "\"70%3CA%3C80\"
\n" ); document.write( "\"70%3C%2878%2B86%2B69%2B79%2BX%29%2F5%3C80\"
\n" ); document.write( "\"350%3C%28312%2BX%29%3C400\"
\n" ); document.write( "\"highlight%2838%3CX%3C88%29\"
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