document.write( "Question 813637: Christian has scores of 68, 65, 75, and 78 on his algebra tests. Use a compound inequality to find the scores he can make on his final exam to receive a C in the course. The final exam counts as two tests, and a C is received if the final course average is from 70 to 79. \n" ); document.write( "
Algebra.Com's Answer #489837 by TimothyLamb(4379)\"\" \"About 
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(68 + 65 + 75 + 78 + f)/6 = 70
\n" ); document.write( "(286 + f)/6 = 70
\n" ); document.write( "286 + f = 70*6
\n" ); document.write( "286 + f = 420
\n" ); document.write( "f = 134
\n" ); document.write( "---
\n" ); document.write( "(68 + 65 + 75 + 78 + f)/6 = 79
\n" ); document.write( "(286 + f)/6 = 79
\n" ); document.write( "286 + f = 79*6
\n" ); document.write( "286 + f = 474
\n" ); document.write( "f = 188
\n" ); document.write( "---
\n" ); document.write( "if the final counts as two tests, I assume that max score on the final is 200 (not 100).
\n" ); document.write( "if that's true, then:
\n" ); document.write( "---
\n" ); document.write( "Answer:
\n" ); document.write( "134 <= f <= 188
\n" ); document.write( "---
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