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Blababa [14]
3 years ago
12

The second term of an arithmetic sequence is 13 and the fourth term is 7.

Mathematics
1 answer:
Tomtit [17]3 years ago
5 0

Answer:

<h3>                 \bold{a_{13}=52}</h3>

Step-by-step explanation:

d=a_4-a_3=a_3-a_2\\\\a_3-a_2=a_4-a_3\\\\2a_3=a_2+a_4\\\\2a_3=13+7\\\\2a_3=20\\\\a_3=10\\\\d=10-13=-3\\\\\\a_2=a_1+d\quad\implies\quad a_1=a_2-d=13-(-3)=16\\\\a_n=a_1+d(n-1)\\\\a_{13}=16+(-3)(13-1)=16+36=52

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Multiply 9/4 x 14<br><br> -23/4<br> -28<br> -63/2
Tatiana [17]

Answer:

<h2>\frac{63}{2}</h2>

Step-by-step explanation:

14 =  \frac{14}{1}

\frac{9}{4}  \times  \frac{14}{1}  =  \frac{126}{4}  =  \frac{63}{2}

6 0
3 years ago
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The collection of distinct vowel letters from the words PNEUMONOULTRAMICROSCOPICSILICOVOLCANOCONIOSIS​

The words' vowel letters are [A,,E,I,O,U].

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4 0
2 years ago
You make $10 on the first day, $20 on the second day, $40 on the third day, $80 on the fourth day, and so on. What is your total
Trava [24]
The answer to this question is 5,120 you have to multiply by 2
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3 years ago
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sergij07 [2.7K]

Answer:

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Step-by-step explanation:

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3 years ago
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Answer:

All real numbers

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3 0
4 years ago
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