4 years ago

HELP WITH PROBABILITY ASAP PLZZZZ WILL UP-VOTE!!! 2q

Mathematics

1 answer:

Kipish [7]4 years ago

3 0

question 5 : 8/20= 2/4(i hope ...not sure)
question 1: 1/4(without a doubt)

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18. Solve m +2n² = 7m for n.

mote1985 [20]

Answer:

sqrt of 3m (sorry I can't figure out how to get the symbol)

Step-by-step explanation:

M+2n^2=7m

2n^2=7m-m

2n^2=6m

n^2=3m

n= sqrt(3m)

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3 years ago

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The income from the spanish clubs bake sale was $260. expenses for the sale totaled $60.use integer addition to find the total p

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The total profit was $200

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4 years ago

Find the perimeter and area of the polygon with the given vertices. Round your answers to the nearest tenth, if necessary.

Scilla [17]

24.5, 2 sides are 7 and 7x7=49. then you have to divide by two because it is a triangle so the answer is 24.5

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3 years ago

Find x and RS if S is between R and T <br>RS=6x,ST=12,and RT=72

sergij07 [2.7K]

Ah, ok

RST

so RS+ST=RT
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4 years ago

In a certain country, the average age is 31 years old and the standard deviation is 4 years. If we select a simple random sample

KengaRu [80]

Answer: 0.0062

Step-by-step explanation:

Given : Mean : $\mu=\ 31$

Standard deviation : $\sigma= 4$

Sample size : $n=100$

Assume that age of people in the country is normally distributed.

The formula to calculate the z-score :-

$z=\dfrac{x-\mu}{\dfrac{\sigma}{\sqrt{n}}}$

For x = 32

$z=\dfrac{32-31}{\dfrac{4}{\sqrt{100}}}=5$

The p-value = $P(x\geq32)=P(z\geq5)$

$=1-P(z$

Hence, the the probability that the average age of our sample is at least =0.0062

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4 years ago