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fgiga [73]
3 years ago
15

A train is traveling at the rate of 135 miles per hour. How far will the train travel in 3 hours?

Mathematics
1 answer:
dedylja [7]3 years ago
4 0

Answer:

d.405

Step-by-step explanation:

135 x3=405

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Answer:

there was a 44 degree change in the tenpature

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Please Help!!!!!! You have twice as many nickels as pennies. you have $1.10. how many of each coin do you have? Solve each probl
astraxan [27]
There are 20 nickels and 10 pennies.

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Evaluate C_n.xP^xQn-x For the given n=7, x=2, p=1/2
r-ruslan [8.4K]

Answer:

The value of given expression is \frac{21}{128}.

Step-by-step explanation:

Given information: n=7, x=2, p=1/2

q=1-p=1-\frac{1}{2}=\frac{1}{2}

The given expression is

C(n,x)p^xq^{n-x}

It can be written as

^nC_xp^xq^{n-x}

Substitute n=7, x=2, p=1/2 and q=1/2 in the above formula.

^7C_2(\frac{1}{2})^2(\frac{1}{2})^{7-2}

\frac{7!}{2!(7-2)!}(\frac{1}{2})^2(\frac{1}{2})^{5}

\frac{7!}{2!5!}(\frac{1}{2})^{2+5}

\frac{7\times 6\times 5!}{2\times 5!}(\frac{1}{2})^{2+5}

21(\frac{1}{2})^{7}

\frac{21}{128}

Therefore the value of given expression is \frac{21}{128}.

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3 years ago
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Step-by-step explanation:

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shepuryov [24]

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Step-by-step explanation:

x^2 - 3x - 28 =/>

(factor)

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x + 4 = 0 or x - 7 = 0

(subtract -4 from 0 and 7 from 0)

x = -4 or x =7

6 0
3 years ago
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