document.write( "Question 460237: GRADES~ A STUDENT SCORES 75,86,72 ON THREE 100 POINT EXAMS. IF THE FINAL IS WORTH 150 POINTS FIND THE RANGE OF FINAL EXAM SCORES S THAT GIVES THE STUDENT AN OVERALL PERCENTAGE OF 80%OR HIGHER. \n" ); document.write( "

Algebra.Com's Answer #315663 by MathLover1(20850) $\"\"$ $\"About$

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you already have an average of $\"%2875%2B86%2B72%29%2F3=77.7\"$ \r
\n" ); document.write( "\n" ); document.write( "with the final exam score $\"x\"$ :\r
\n" ); document.write( "\n" ); document.write( " $\"%2875%2B86%2B72%2Bx%29%2F4=80\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"%28233%2Bx%29%2F4=80\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"233%2Bx=320\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"x=320-233\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"x=87\"$ .....the final exam score should be at least $\"87\"$ ;it could be more, but not less\r
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