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UkoKoshka [18]
3 years ago
12

My sister needs help w this but i don’t understand lol

Mathematics
2 answers:
Dafna11 [192]3 years ago
7 0
The answer is 12 :) brainliest?
Readme [11.4K]3 years ago
4 0

Answer:

its 4+4+4=12

Step-by-step explanation:

.............

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In an accounting class of 200 students, the mean and standard deviation of scores was 70 and 5, respectively. Use the empirical
lina2011 [118]

Answer:

a. About 64

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean = 70

Standard deviation = 5

Use the empirical rule to determine the number of students who scored less than 65 or more than 75?

65 = 70 - 5

So 65 is one standard deviation below the mean

75 = 70 + 5

So 75 is one standard deviation above the mean.

By the Empirical Rule, 68% of the students scored between 65 and 75. The other 100-68 = 32% scored less than 65 or more than 75.

Out of 200, that is

0.32*200 = 64

So the correct answer is:

a. About 64

5 0
3 years ago
(2.1) 1. Write each repeating decimal using bar<br> notation.<br> a) 0.777 77...
Anestetic [448]
0.7 (put the bar over the 7)
7 0
3 years ago
Read 2 more answers
What times what equals 375
xz_007 [3.2K]
75 * 5 = 375

Hope I helped! :)

4 0
3 years ago
Read 2 more answers
Why is it that -log(x+8)=4-log(x-7) has no solution? (they are log base 2)
Lerok [7]
-log(x+8)=4-log(x-7) 

-\log _{10}\left(x+8\right)+\log _{10}\left(x+8\right)=4-\log _{10}\left(x-7\right)+\log _{10}\left(x+8\right) 

0=4-\log _{10}\left(x-7\right)+\log _{10}\left(x+8\right) 

0+\log _{10}\left(x-7\right)=4-\log _{10}\left(x-7\right)+\log _{10}\left(x+8\right)+\log _{10}\left(x-7\right) 

\log _{10}\left(x-7\right)=\log _{10}\left(x+8\right)+4 

\log _{10}\left(x-7\right)=\log _{10}\left(x+8\right)+\log _{10}\left(10000\right) 

x-7=\left(x+8\right)\cdot \:10000 

\mathrm{Solve\:}\:x-7=\left(x+8\right)10000:\quad x=-\dfrac{26669}{3333} 

\mathrm{Verifying\:Solutions}:\quad x=-\dfrac{26669}{3333}\space\mathrm{False} 

\mathrm{No\:Solution\:for\:x\in \mathbb{R}}
3 0
2 years ago
Read 2 more answers
5x – 2= 8<br> Please help me
Marta_Voda [28]

Answer:

x = 2 because 5 times 2 = 10 and 10 - 2 = 8

Step-by-step explanation:

6 0
3 years ago
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