3 years ago

I'm doing systems of linear equations and need more help

Mathematics

1 answer:

Pani-rosa [81]3 years ago

8 0

Okay What’s the problem

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Step-by-step explanation:

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2 years ago

Please help me on this ASAP am I right ?

Paraphin [41]

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In the 2014 - 2015 school year, the mean score on the critical reading of the SAT was 490 with a standard deviation of 102 for j

bonufazy [111]

<u>Answer:</u>

The Ranking Percentile is (B) 97.5%

<u>Explanation :</u>

To find the percentile rank we need to find the z- score. After finding the z-score match this value with the corresponding value in z-score table.

Formula to find the z-score

Z-score= $\frac{\text { scored obtained - mean }(\mu)}{\text { standard deviation }(\sigma)}$

Substituting the values in the above equation, we find

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So, the Z-score is +2

Now, the corresponding value of Z-score 2 in the table is 0.9772

or the percentile score is 97.72 ~ 97.5 .

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3 years ago

There are 24 pens in a desk drawer the cans are either red or blue the ratio of red pens to blue pens is 521 how many red pens a

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2 years ago

I'm doing systems of linear equations and need more help​

I'm doing systems of linear equations and need more help