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ra1l [238]
3 years ago
6

Brainliest Brainliest Brainliest

Mathematics
2 answers:
Paladinen [302]3 years ago
3 0

Answer:

2.5 times z = 10, or 2.5<em>z </em>=<em> </em>10

Step-by-step explanation:

Darya [45]3 years ago
3 0
The answer is 2.5 • x = 10







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A circle has a radius of 3it has an arc with a 20 degree central angle
alexandr402 [8]

Answer:

Step-by-step explanation:

The circumference of the circle is 6π inches  

The length of the arc is (20/360)×6π = 1.04 inches  

(The complete circumference would cover 360°. Angle ALB is 20°)

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All holes dug 2 3/8 feet deep for fence post the fence posts 6 feet long how far above the ground will the fence post be what it
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3.625 Feet is the answer

Hope this helps :)
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JulsSmile [24]

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3 years ago
The time to fly between New York City and Chicago is uniformly distributed with a minimum of 120 minutes and a maximum of 150 mi
lara [203]

Answer:

a) 33.33%)

b) 135 minutes

c) 8.66 min

d) 50%

Step-by-step explanation:

a) the probability for a uniform distribution is

P(b<X<a) = (a-b)/(c-d) , where c and d are the maximum and minimum values

therefore the probability that the flight is more than 140 minutes ( and less than 150 since it is the maximum value)

P(140<X<150) = (a-b)/(c-d) = (150-140)/(150-120) = 10/30 = 1/3 (33.33%)

b) the mean (expected value) for a uniform probability distribution is

E(X) = (c+d)/2 = (120+150)/2 = 135 minutes

c)  the standard deviation for a uniform probability distribution is

σ²(X)= (c-d)²/12 = (150-120)²/12 = 75 min²

σ = √75 min² = 8.66 min

b) following the same procedure as in a)

P(120<X<135) = (a-b)/(c-d) = (135-120)/(150-120) = 15/30 = 1/2 (50%)

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3 years ago
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Answer:

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Step-by-step explanation:

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