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bazaltina [42]
2 years ago
10

Help please!

Mathematics
2 answers:
Leni [432]2 years ago
7 0

Answer:

Did you try turning it off and on again?

Step-by-step explanation:

Sergeeva-Olga [200]2 years ago
3 0

Answer:

69

Step-by-step explanation:

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√169= 13

169-13 = 156

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Mariana ficou com 119 balas.

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3 years ago
2hours to 1day as a ratio in its simplest form​
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Step-by-step explanation:

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A box contains four 75 W lightbulbs, three 60 W lightbulbs, and three burned-out lightbulbs. Two bulbs are selected at random fr
Law Incorporation [45]

Answer:

a. 0.689

b. 0.8

c. 0.427

Step-by-step explanation:

The given scenario indicates hyper-geometric experiment because because successive trials are dependent and probability of success changes on each trial.

The probability mass function for hyper-geometric distribution is

P(X=x)=kCx(N-k)C(n-x)/NCn

where N=4+3+3=10

n=2

k=4

a.

P(X>0)=1-P(X=0)

The probability mass function for hyper-geometric distribution is

P(X=x)=kCx(N-k)C(n-x)/NCn

P(X=0)=4C0(6C2)/10C2=15/45=0.311

P(X>0)=1-P(X=0)=1-0.311=0.689

P(X>0)=0.689

b.

The mean of hyper-geometric distribution is

μx=nk/N

μx=2*4/10=8/10=0.8

c.

The variance of hyper-geometric distribution is

σx²=nk(N-k).(N-n)/N²(N-1)

σx²=2*4(10-4).(10-2)/10²*9

σx²=8*6*8/900=384/900=0.427

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3 years ago
Which of the following methods would be the easiest to use to solve x^2-11=0 A factoring B isolating the x^2 term and finding th
Marat540 [252]
The answer is B. In this case when you isolate the variable it just takes 2 steps. The others require more steps and tedious calculation.
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