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Tpy6a [65]
3 years ago
15

What is the twentieth term of the arithmetic sequence described by the equation an= 3n - 10?

Mathematics
1 answer:
sergij07 [2.7K]3 years ago
8 0

Answer:

The twentieth term is 50.

Step-by-step explanation:

The equation that describes the arithmetic sequence describes it's "general term", which means that all the numbers in that sequence must follow that equation. For instance, if we want to find the first term of the sequence we must make a = 1 and we have:

a1 = 3*1 - 10

a1 = -7

Therefore to find the twentieth term we need to make n equal to 20. This is done below:

a20 = 3*20 - 10

a20 = 60 - 10

a20 = 50

The twentieth term is 50.

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What value of a makes the equation true?<br> a+29=-63<br><br> I need help!!
irakobra [83]

Answer:

a = -92

Step-by-step explanation:

<u>Step 1:  Subtract 29 from both sides</u>

a + 29 = -63

a + 29 - 29 = -63 - 29

<em>a = -92</em>

<em />

Answer:  a = -92

7 0
3 years ago
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Which expressions are equivalent to the one below? Check all that apply. log2 16 + log2 16 A. log2(28) B. 8 C. log 256 D. log2 2
eduard

Answer:

B. 8.

D.  log2 256.

Step-by-step explanation:

Generally:

loga b + loga b

= loga b^2.

Therefore log2 16 + log2 16

= log2 16^2

= log2 256.

From the above:

256 = 2^x   where x is the log.

Now 2^8 = 256   so the original log2 16 + log2 16 = 8.

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3 years ago
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Mr.Watson buys 4 gallons of paint that cost 34 per gallon how much does Mr.Watson spend on paint
yan [13]

Answer:

136 dollars

Step-by-step explanation:

34 * 4 = 136

8 0
3 years ago
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What is the resulting polynomial when -7w² +13 is subtracted from -2w²+6w - 19?​
maks197457 [2]

Answer:

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Step-by-step explanation:

Subtract as needed and combine like terms

(-2w^2 + 6w - 19) - (-7w^2 +13) dont forget to distribute the negative

so you get this:

-2w^2 + 7w^2 = 5w^2

6w

-19 - 13 = - 32

your answer is 5w^2 + 6w - 32

hope this helps :)

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2 years ago
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A home improvement store has at least $18,000 worth of lawnmowers to sell during the summer. If the cost of each lawnmower is $4
telo118 [61]

Hi!

Your answer would be: D) Exactly 45

Reason being: $18,000 divided by $400 equals 45 lawn mowers.

Therefore, the answer is D, exactly 45.

Hope this helps!

5 0
3 years ago
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