document.write( "Question 131207: A student must have an average grade of 90 or grater on five tests in a course to get a grade of A. The student has grades of 84, 93, 92, and 89 on the first four tests. What possible scores on the fifth test would resalt in a grade of A for the student?
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Algebra.Com's Answer #95791 by Earlsdon(6294) $\"\"$ $\"About$

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To get an average grade of 90 or better (>or= 90), let the grade on the fifth test be x, then find the average of the five test scores.
\n" ); document.write( " $\"%2884%2B93%2B92%2B89%2Bx%29%2F5+%3E=+90\"$ Add the four scores and multiply both sides by 5.
\n" ); document.write( " $\"358%2Bx+%3C=+450\"$ Subtract 358 from both sides.
\n" ); document.write( " $\"x+%3C=+92\"$
\n" ); document.write( "The student has to score at least 92 on the fifth test to get an average grade of 90 on the five tests. \n" ); document.write( "

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