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Does anyone know how to do this? This looks familiar to me but I don’t know what to do.

Does anyone know how to do this? This looks familiar to me but I don’t know what to-example-1
User Dynelight
by
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1 Answer

4 votes

Let us set x for the missing score.

Now, if he wants to keep an average of 86 or greater, we need to use the next inequality:


(68+84+x)/(3)≥86

Then, we need to solve for x:


(152+x)/(3)≥86

Multiply both sides by 3:


\begin{gathered} (3)(152+x)/(3)≥(3)(86) \\ 152+x≥258 \end{gathered}

Subtract both sides by 152:


152-152+x≥258-152

Simplify:


x≥104

In this case, the score is 104 is greater than the possible number of points.

Hence, enter DNE

User Rio Weber
by
8.0k points

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