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Kruka [31]
4 years ago
5

4. You decided to gather some information for how many days it rained over a period of time. You observed that it rained on 17 d

ays and it did not rain on 13 days. Write a ratio comparing the number of days it rained to the total days you were collecting data
Mathematics
1 answer:
Zielflug [23.3K]4 years ago
5 0

Answer:

17:30

Step-by-step explanation:

First, we know that it rained on 17 days.

17 + 13 = 30, so there were 30 days that data was collected.

So, the ratio comparing the days it rained to the total days collecting data will be 17:30.

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Step-by-step explanation:

we have:

\tan(a)  +  \tan(b)  +  \tan(c)  \\  =  \tan(a)  +  \tan(b)  -  \tan(a + b)  \\  =  \tan( a)  +  \tan(b)  -  \frac{ \tan(a) +  \tan(b)  }{1 -  \tan(a)  \tan(b) }  \\  =  \frac{ ( \tan(a) +  \tan(b)  ) \tan(a) \tan(b)  }{ \tan(a) \tan(b)  - 1 } (1)

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from (1)(2) => proven

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