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.

Let x be the percentage score he got in fifth test,

According to the question,

His score in first, second, third and fourth test are 80%, 84%, 76% and 77% respectively,

Thus, the average of his total score in the five test,

=

But, Again according to the question,

The average of the five grades as greater than or equal to 80%

That is,

⇒

⇒

⇒

Thus, the least score he can get in the fifth test is 83.

maybe showing the graph would

step-by-step explanation:

-387129 iq

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