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snow_tiger [21]
3 years ago
12

5. Let us apply the formula to some numbers. The following are the durations in minutes of a series of telephone calls. You want

to know the mean duration of the calls.
µ ═ ∑ X
n

Duration of calls: 12.3, 18.2, 33.1, 9.1, 7.3, 10.4, 11.5, 4.5, 8.9, 3.3
Mathematics
1 answer:
UkoKoshka [18]3 years ago
4 0

Answer: The mean is 11.86

Step-by-step explanation:

Add all the numbers and divide by however many numbers there are. In this case there are 10 numbers

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How many white keys does a standard modern piano have? 1=102 2=52 3=88
Marta_Voda [28]
A standard piano has 88 keys on it

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Which statement is correct?<br> A. <br> B. <br> C. <br> D.
geniusboy [140]

Answer:

B

Step-by-step explanation:

Answer:

B

Step by Step explanation:

So since the equation says that 8 is less than the square root for b, It is correct because the square root of 72 would be 8.48528137424. Which of course 8, is less than that. But it also says that the square root of 72 is less than 9. Which based on my calculations would be correct.

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3 years ago
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So is anyone good at geometry ive posted this before but i was used for points i need help
SOVA2 [1]
Answers:
Reason 3: Definition of Parallelogram
Reason 4: Alternate Interior Angles Theorem
Reason 5: Reflexive Property of Congruence
Reason 6: ASA Congruence Property

------------------------------------------------------

Explanations:

Explanation for Reason 3: A parallelogram, by definition, has opposite sides that are parallel. It's built into the name more or less. Sides AB and CD are opposite one another in the parallelogram so they are parallel segments

Explanation for Reason 4: Angle ABD is congruent to angle CDB because they are alternate interior angles. They are on the inside of the "train tracks" that are formed by AB and CD. They lay on opposite sides of the transversal BD

Explanation for Reason 5: Any segment is congruent to itself; ie, the same length

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8 0
3 years ago
Help please thank you giving 15 pts
slega [8]

Answer:

x=22

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2x-40+8x=180

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8 0
3 years ago
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What is the variance of the data set? 8, 9, 10, 16, 17
adoni [48]
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x - mean:

8 - 12 = -4,  -4² = 16

<span>9 - 12 = -3,  -3² = 9
</span>
<span>10 - 12 = -2,  -2² = 4
</span>
<span>16- 12 = 4,  4² = 16</span>

<span>17- 12 = -5,  -5² = 25
</span>
Sum of the squares =   16 + 9 + 4 + 16 +25 = 70

Variance = 70/5 = 14

Variance = 14
6 0
3 years ago
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