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e-lub [12.9K]
3 years ago
10

Three straight lines intersect at $O$, and ray $\overrightarrow{OD}$ divides $\angle COE$ into two angles of equal measure. The

ratio of $\angle COB$ to $\angle BOF$ is $7:2$. What is the number of degrees in $\angle COD$?
Mathematics
1 answer:
riadik2000 [5.3K]3 years ago
8 0

Answer:

12

Step-by-step explanation:

m xxq

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Which lists the fractions Four-sevenths, Five-ninths, and in order from least to greatest?
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Answer:

Solution given:

the fractions Four-sevenths=4/7≈0.57

the fractions Five-ninths=5/9≈0.55

Since 0.55 is less than 0.57

<u>least=the fractions Five-ninths</u>

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3 0
3 years ago
9.4 The heights of a random sample of 50 college stu- dents showed a mean of 174.5 centimeters and a stan- dard deviation of 6.9
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Answer:  a) (176.76,172.24), b) 0.976.

Step-by-step explanation:

Since we have given that

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we need to find the 98% confidence interval.

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(a) Construct a 98% confidence interval for the mean height of all college students.

x\pm z\times \dfrac{\sigma}{\sqrt{n}}\\\\=(174.5\pm 2.326\times \dfrac{6.9}{\sqrt{50}})\\\\=(174.5+2.26,174.5-2.26)\\\\=(176.76,172.24)

(b) What can we assert with 98% confidence about the possible size of our error if we estimate the mean height of all college students to be 174.5 centime- ters?

Error would be

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3 years ago
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Answer:

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Step-by-step explanation:

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