dolanjordan39owwyz7 dolanjordan39owwyz7

17-11-2017
Mathematics

contestada

On two tests so far this year, a student received a 78 and a 93. The student wants an average between 80 and 90 inclusive. What are all of the possible scores for the third test so that the student falls within this average?

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samanthamunevar samanthamunevar

17-11-2017

240 <= 171 + x <= 270
and now subtract 171 from all and get
69 <= x <= 99
So any score from 69 to 99 will do.

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