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xz_007 [3.2K]
3 years ago
13

What is the value of this expression? PLEASE HELP!!!!

Mathematics
2 answers:
seropon [69]3 years ago
8 0
If youre just asking for this to be solved the answer is 17, you would do parenthesis first which is 3+1=4, then 12/4= 3, then 6+3=9, 2 X 9= 18, 18-1= 17
Elanso [62]3 years ago
5 0
11  

the answer is 11

hope i helped

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If the student received marks of 84, 78, 84, and 72 on her four normal tests, her weighted mean grade is 81.2 percent.

<h3>What is mean?</h3>

The mean is described as a single number that indicates either the closed value for each item in the collection of data or the mean value for the whole set of data.

On her four regular tests, a student had grades of 84, 78, 84, and 72 out of 100. She received 86 percent on her class projects and 78 percent on the final test.

You may compute the weighted mean as follows:

\rm W_m= 0.4 \times ( \frac{84+78+84+72}{4} )+0.3 \times 78 +0.1 \times 86 + 0.2 \times 87 \\\\ W_m=  81.2 \%

Hence, if the student had marks of 84, 78, 84, and 72 on her four normal tests, her weighted mean grade would be 81.2 percent.

To learn more about the mean refer;

brainly.com/question/22871228

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