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Arlecino [84]
3 years ago
7

NEED HELP PLEASE ASAP! please don’t waste my time i need this grade.

Mathematics
1 answer:
Arlecino [84]3 years ago
8 0
Hmm I think the answer is 95%
1 standard deviation is 13
To find out the range of scores that fit 1 standard deviation from the mean, you would have to take away and add 13 from the mean (133) this gives a range of 120-146 which isn’t right because you’re looking for 107-159.
Next, look for 2 standard deviations from the mean which is just 13 x 2=26.
To find the range of scores that are 2 standard deviations from the mean take away and add 26 to the mean (133) which gives a range of 107-159. This is the correct answer.
2 standard deviations represents 95% of the data. That’s why I think the answer is 95%.

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If 2 sodas and 4 hamburgers are $12.00 and 4 sodas and 2 hamburgers are $9.00 how much is a single hamburger?
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2s + 4h = 12, (1) 4s + 2h = 9. (2) Multiply (1) by 2. You will get 4s + 8h = 24, (1') 4s + 2h = 9. (2') Distract (2') from (1'). You will get 8h - 2h = 24 - 9, or 6h = 15 ---> h =  =  = 2.5. Thus one hamburger price is $2.50. Then from (1) s =  = 1. Answer. One hamburger price is $2.50 and 1 soda costs $1.00.

There is even more elegant way to solve the problem. 

Simply add all hamburgers and all sodas. 6 hamburgers and 6 sodas. $12 + $9 = $21. 

Hence, 1 hamburger + 1 soda =  = $3.50. 

Having this, everybody can solve to the end in this way, actually, without equations and using the mental math only. 


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Translations, reflections, and rotations is the set of transformations you can use to check whether two polygons are congruent.

<span>

Reflection is flipping an object across a line without changing its size or shape.
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The correct answer between all the choices given is the last choice or letter D. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.

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Answer:

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Step-by-step explanation:

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