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Eduardwww [97]
3 years ago
11

How many feet are in a mile

Mathematics
2 answers:
bulgar [2K]3 years ago
6 0
1 mile = 5,280 feet 
Hope this helps!! xx
Triss [41]3 years ago
6 0
There are 5280 feet in a mile!! (btw could you mark me as brainliest if you don't mind? thanks!)
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Which student solved the equation 107 d = 1,733.4 correctly?
frutty [35]

Answer:

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Step-by-step explanation:

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3 years ago
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Calculate the arithmetic sequence in which a9=17 and the common difference is d=-2.1
jek_recluse [69]

Answer:

S_{31}=71.3


Step-by-step explanation:

The nth term of an arithmetic sequence is given by the formula,

U_n=a_1+(n-1)d


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\Rightarrow 17=a_1+(9-1)(-2.1)


\Rightarrow 17=a_1+(8)\times(-2.1)


\Rightarrow 17=a_1-\frac{84}{5}


\Rightarrow 17+\frac{84}{5}=a_1


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The sum of the first n-terms is given by the formula,


S_n=\frac{n}{2}(2a_1+(n-1)d)


To find S_{31}, we substitute n=31, a_1=\frac{169}{5} and d=-2.1.


\Rightarrow S_{31}=\frac{31}{2}(2(\frac{169}{5}+(31-1)(-2.1))


\Rightarrow S_{31}=\frac{31}{2}(2(\frac{169}{5}+(30)(-2.1))



\Rightarrow S_{31}=\frac{31}{2}(\frac{23}{5})


\Rightarrow S_{31}=\frac{713}{10}


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The correct answer is D















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3 years ago
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Help this question question
Step2247 [10]

Answer:

-65 i suppose

Step-by-step explanation:

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2 years ago
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KatRina [158]

Answer:

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3 years ago
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kolbaska11 [484]
If sqrt x = 9 then x = 9*9 = 81

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3 years ago
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