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Lynna [10]
2 years ago
9

2√135-2√60+√15-√240pls solve this surd​

Mathematics
2 answers:
Zepler [3.9K]2 years ago
5 0

Answer:

wrong❌❌

question

wrong❌❌

question

Arte-miy333 [17]2 years ago
5 0

Answer:

3√15. Explanation: Factor out 135 completely so you can take out any perfect squares. √135 =√3⋅3⋅3⋅5 =√32⋅ 3⋅

Step-by-step explanation:

Hope this helps :D

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Step-by-step explanation:

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Let x denote the courtship time for a randomly selected female–male pair of mating scorpion flies (time from the beginning of in
gavmur [86]

Complete Question:

a) Is it plausible that X is normally distributed?

b) For a random sample of 50 such pairs, what is the (approximate) probability that the sample mean courtship time is between 100 min and 125 min?

Answer:

a) It is plausible that X is normally distributed

b) probability that the sample mean courtship time is between 100 min and 125 min is 0.5269

Step-by-step explanation:

a)X denotes the courtship time for the scorpion flies which indicates that is a real - valued random variable, and since normal distribution is a continuous probability distribution for a real valued random variable, it is plausible that X is normally distributed.

b) Probability that the sample mean courtship time is between 100 min and 125 min

\mu = 120\\n = 50

P(x_{1}  < \bar{X} < x_{2} ) = P(z_{2}  < \frac{x_{2}- \mu }{SD} ) - P(z_{1}  < \frac{x_{2}- \mu }{SD})

SD = \sqrt{\frac{\sigma^{2} }{n} } \\SD = \sqrt{\frac{110^{2} }{50} } \\SD = 15.56

P(100 < \bar{X}

From the probability distribution table:

P(z_{2}  < 0.32 ) = 0.6255\\ P(z_{1}  < -1.29) = 0.0986

P(100 < \bar{X}

6 0
3 years ago
The cost of the Ferris wheel is 1/3 of the cost of the roller coaster. the roller coaster costs $6 how much does it cost to ride
Sedbober [7]

Answer:$2

Step-by-step explanation:

the ferris wheel costs $2

5 0
2 years ago
Read 2 more answers
Х- 1, 2, 3 ,4
Len [333]
I think it’s C, good luck
4 0
2 years ago
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