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Ira Lisetskai [31]
3 years ago
12

I need help with number 9: h, i, k and l

Mathematics
1 answer:
lozanna [386]3 years ago
7 0
But i really need a name of this book and authors :)

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Matthew surveyed 600 of the students in his school about their favorite color. Students could choose between blue and purple. 11
yKpoI14uk [10]
The answer is 534 students
89%
5 0
2 years ago
Consider a normal population distribution with the value of σ known. (a) what is the confidence level for the interval x ± 2.81σ
sammy [17]
The confidence level would be 99.5%.

When we know the confidence level, we find the z-score by:
Dividing the CL by 100;
Subtracting this result from 1;
Dividing this result by 1;
Subtracting this result by 1.

Algebraically, this looks like:
1-(\frac{1-(\frac{CL}{100})}{2})

Using a z-table (http://www.z-table.com), we see that a z-score of 2.81 results in an area under the curve of 0.9975, so we now have
1-(\frac{1-(\frac{CL}{100})}{2})=0.9975

To begin solving this, we will subtract 1 from both sides:
-(\frac{1-(\frac{CL}{100})}{2})=-0.0025
\\
\\(\frac{1-(\frac{CL}{100})}{2})=0.0025

We will now multiply both sides by 2:
1-\frac{CL}{100}=0.005

Subtract 1 from both sides:
-\frac{CL}{100}=-0.995
\\
\\\frac{CL}{100}=0.995

Multiply both sides by 100:
CL = 99.5
7 0
3 years ago
Solve for b:<br> 6b + 6b + 9 -9 = 4(3b)
Travka [436]
Combine like terms so 12b=12b
Then divide by 12 which then b=1
5 0
3 years ago
7h=-(-2h-18) solve for h please im giving out brainliest
Eduardwww [97]

Answer:

-2

Step-by-step explanation:

trust me bro

6 0
3 years ago
Which equation could generate the curve in the graph below?
nexus9112 [7]

Answer:

Its C boys

Step-by-step explanation:

I graphed all of them and compared

4 0
3 years ago
Read 2 more answers
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