haGelbcocowa1nnih haGelbcocowa1nnih

11-11-2016
Mathematics

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A student scored 84 and 87 on her first two quizzes. Write and solve a compound inequality to find the possible values for a third quiz score that would give her an average between 85 and 90, inclusive.

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nobillionaireNobley nobillionaireNobley

16-11-2016

Let the third score be x, then
85 ≤ (84 + 87 + x)/3 ≤ 90
255 ≤ 171 + x ≤ 270
84 ≤ x ≤ 99

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