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mshepherdmiller
31.10.2019 •
Mathematics
At clement's jr. high school, a student needs an 86 average to earn a b. sue's average on
the first four tests in earth science so far is an 84. whạt grade must she earn on the last test to
achieve a b average -
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Ответ:
Sue must score 94 on the final test to earn a B.
Step-by-step explanation:
There are five tests in total.
Sue's average on the first four tests is 84.
If after the final test, she scores X, she will have a B on average of five tests.
We have the following equation:
86 = (4 × 84 + X)/5
<=> X = 5 × 86 - 4 × 84
=> X = 94
Ответ:
Here is the chart, I am sure this is the problem you're talking about.