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podryga [215]
3 years ago
11

If A = (1,2,3,4,5), then the number of proper subsets of A is- ​

Mathematics
1 answer:
Mandarinka [93]3 years ago
8 0

Answer: One of them is the set {1,2,3,4,5,6}itself; one is the empty set, containing no elements. “Proper subset of a set ” usually denotes a subset in which at least one element of the original set is missing; so one of the subsets - the original set iitself - is not a proper subset. Therefore the answer is 63.

Step-by-step explanation:

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Each of a regular polygon is 140°,find the number of the sides that ghe polygon has​
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Answer:

the answer should be 360/36=10 sides

Step-by-step explanation:

A regular polygon is 144 deg the exterior angle is 36 deg.

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Find x<br> 27 degrees and 32 degrees will give brainlist
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Answer:

x = 121°

Step-by-step explanation:

If you add up all the angles of a triangle, you get 180°.

So you must add up all the angles.

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Next you subtract 59 on both sides.

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If you would like to check your answer, you can add up 27, 32, and 121. If it all equals to 180, then your answer is correct.

8 0
3 years ago
Joe heard from a reliable source that only 22% of people actually sleep 8 hours or more per night. You do a survey and find 58 o
Juliette [100K]

Answer:

95% Confidence interval:  (31.32%,47.04%)

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 148

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\hat{p} = \dfrac{x}{n} = \dfrac{58}{148} = 0.3918

95% Confidence interval:

\hat{p}\pm z_{stat}\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}

z_{critical}\text{ at}~\alpha_{0.05} = 1.96

Putting the values, we get:

0.3918\pm 1.96(\sqrt{\dfrac{0.3918(1-0.3918)}{148}})\\\\ = 0.3918\pm 0.0786\\\\=(0.3132,0.4704)=(31.32\%,47.04\%)

(31.32%,47.04%)  is the required 95% confidence interval.

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3 years ago
15 POINTS PLEASE HELP IVE ONLY GOT 10 MINS
frosja888 [35]
C is what I think it is
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