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PtichkaEL [24]
3 years ago
8

5.

Mathematics
1 answer:
Simora [160]3 years ago
4 0
A. Yes because -2(2-4) does equals =4
B. Yes because 26/2 does equals = 13
C. No because -3.8(2) equals -7.6 and not -7.4
D. No because 4(2-1)-3(2-2) equals 4 and not -8
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Scores on the GRE (Graduate Record Examination) are normally distributed with a mean of 513 and a standard deviation of 82. Use
Trava [24]

Answer:

Note that we need calculate the scores between the mean (\mu=513) and the mean plus 3 times the standard deviation. It is 3 times since the distance between the values given (513 and 759) divided by the standard deviation is 3 (\frac{759-513}{82}=3)

So the rule say that 99.7% of data is between \mu - 3\sigma and \mu + 3\sigma, as it is a normal distribution half of 99.7% is between \mu and \mu+3\sigma. Hence 49.85% of people score between 513 and 759.

4 0
3 years ago
Help please in need help help
Zanzabum
The value of x is zero
5 0
2 years ago
Read 2 more answers
Please help!!!!!!!!!
Harlamova29_29 [7]

Answer:

10.3

Step-by-step explanation:

\sqrt{ { (  8 - ( - 1))}^{2} +  {( - 2 - 3)}^{2}  }  =  \sqrt{ {9}^{2}  +  {( - 5)}^{2} }  =  \sqrt{81 + 25}  =  \sqrt{106}  = 10.3

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5 0
2 years ago
9.25 the average score for Mrs Myles class was 70% of Mrs Jones i class test average score in Mr. Myles class
vodka [1.7K]
80.2 is the correct answer
3 0
3 years ago
Need help asap need it thenext few minutes
pantera1 [17]

Answer:

Correct Option is d (x+3)^2 = 11

Step-by-step explanation:

For completing the square our equation should be in the form of a^2 +2ab + b^2 = (a+b)^2

In the given equation we have:

x^2 +6x -2\\x^2 + 2(x) (?) +(?)^2 = 2\\for\,\, making\,\, 6x\,\, 2*x*3=6x \\so, \,\,we\,\, can\,\, add\,\, and\,\, subtract\,\, (3)^2 \,\,on\,\, both\,\, sides\\x^2 + 2(x) (3) +(3)^2 -(3)^2= 2\\(x+3)^2 -9 =2\\(x+3)^2 =2+9\\(x+3)^2 = 11

Correct Option is d (x+3)^2 = 11

6 0
2 years ago
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