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3 years ago

Find the 20th term of the arithmetic sequence 15,9,3,-3

Mathematics

1 answer:

kati45 [8]3 years ago

3 0

Answer:

-99

Step-by-step explanation:

$a = 15 \\ d = - 6 \\ {n}^{th} term = a + (n + 1)d = 15 + (n - 1)( - 6) \\ {20}^{th} term =15 + (20 - 1)( - 6) = 15 - 114 = - 99$

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krok68 [10]

Answer:

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Step-by-step explanation:

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4 years ago

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PSYCHO15rus [73]

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4 years ago

88.1 - 2.3f = 72.46 i know how to do it but at the same time i dont lol

d1i1m1o1n [39]

Answer:

$f=6.8$

Step-by-step explanation:

Given equation:

$88.1-2.3f=72.46$

To solve for the unknown variable $f$ .

Solution:

In order to solve for $f$ , we will isolate $f$ alone on one side by carrying out math operations to both sides.

We have:

$88.1-2.3f=72.46$

Subtracting both sides by 88.1

$88.1-88.1-2.3f=72.46-88.1$

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Dividing both sides by -2.3

$\frac{-2.3f}{-2.3}=\frac{-15.64}{-2.3}$

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4 years ago

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guapka [62]

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3 years ago

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sergeinik [125]

Answer:

35 min

Step-by-step explanation:

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