Mathematics, 24.12.2019 18:31 srhg1204
In a class in which the final course grade depends entirely on the average of four equally weighted 100-point tests, charles has scored 9393, 8282, and 8787 on the first three. what range of scores on the fourth test will give charles a c for the semester (an average between 7070 and 7979, inclusive)? assume that all test scores have a non-negative value.
Answers: 3
![[tex]7070 \leq \frac{9393+8282+8787+X}{4} \leq 7979 \, \rightarrow 28280 \leq 9393+8282+8787+X< 31916 \\\rightarrow 28280-9393-8282-8787 \leq X \leq 31916 - 9393-8282-8787 \, \rightarrow 1818 \leq X \leq 5454](/tpl/images/0431/8945/2cc1a.png)
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