Simon must maintain an average grade of 80% or better in his math class to be eligible to play sports. his math grade so far are 80%, 84%, 76%, 77% at this point his grades make him ineligible to play. what is the lowest he can score on the next grade to bring his average score up to 80%. wright and inequality to represent the average of the five grades as greater than or equal to 80%. use the inequality to prove what his lowest score could be on the fifth test.