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Setler [38]
3 years ago
6

Which of the following method for making a proof does not involve the negation of a statement

Mathematics
1 answer:
s2008m [1.1K]3 years ago
8 0

We don't know what the answer choices are!!


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A set of 200 test scores are normally distributed with a mean of 70 and a standard deviation of 5. Approximately how many studen
spin [16.1K]

Answer:  About 191 students scored between a 60 and an 80.

Step-by-step explanation:

Given : A set of 200 test scores are normally distributed with a mean of 70 and a standard deviation of 5.

i.e. \mu=70 and \sigma=5

let x be the random variable that denotes the test scores.

Then, the probability that the students scored between a 60 and an 80 :

P(60

The number of students scored between a 60 and an 80 = 0.9544 x 200

= 190.88 ≈ 191

Hence , about 191 students scored between a 60 and an 80.

8 0
3 years ago
Under his cell phone plan, Evan pays a flat cost of $57.50 per month and $3 per gigabyte. He wants to keep his bill at $62.90 pe
frozen [14]

Answer:

3g+57.50=62.90

Step-by-step explanation:

Your total will be 62.90 so its by its self and you need to subtract 57.50 and divide by 62.90

4 0
2 years ago
Show the correct steps to simplify this problem.
KengaRu [80]
Do 12-5 then 6.4 then 2.2 then whatever answer you get for 12-5 multiply it by the answer you get for 6.4 then subtract whatever answer you get for 2.2 hope this helps!
7 0
2 years ago
A line of best fit....?
AlexFokin [52]
I’m pretty sure the correct answer is C
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3 years ago
Help me ahhhhhhhhhhhhhhhhhh
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I got m 7/3 I think that's the answer

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