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xxTIMURxx [149]
3 years ago
10

Please helpppp it’s due at 5 part 1

Mathematics
1 answer:
Anna [14]3 years ago
3 0

Answer:

I think the first one is B

Step-by-step explanation:

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Step-by-step explanation:

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\bf \\\\&#10;-------------------------------\\\\&#10;\textit{sum of a finite arithmetic sequence}\\\\&#10;S_n=\cfrac{n}{2}(a_1+a_n)\qquad &#10;\begin{cases}&#10;n=n^{th}\ term\\&#10;a_1=\textit{first term's value}\\&#10;a_n=\textit{value of the }n^{th}\ term\\&#10;------------\\&#10;n=12\\&#10;a_1=123\\&#10;a_{12}=13&#10;\end{cases}&#10;\\\\\\&#10;S_{12}=\cfrac{12}{2}(a_1+a_{12})\implies S_{12}=\cfrac{12}{2}(123+13)

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6 0
4 years ago
What is the Gcf of 225 and 415
kirza4 [7]

Answer:

5

Step-by-step explanation:

To get the Greates Common Factor (GCF) of 225 and 415 we need to factor each value first and then we choose all the copies of factors and multiply them:

225:    3 3 5 5  

415:        5   83

GCF:        5    

The Greates Common Factor (GCF) is:   5

7 0
2 years ago
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