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7nadin3 [17]
1 year ago
9

B(n)=−4−2(n−1) What's the 12th term in the sequence?

Mathematics
1 answer:
marysya [2.9K]1 year ago
8 0

The 12th term in the sequence is -26.

Given,

B (n) = -4 – 2(n – 1)

We have to find the 12th term in the sequence:

To find the nth term in an arithmetic sequence:

An arithmetic sequence's nth term is determined by the formula a = a + (n - 1)d. The common difference, or d, is the difference between any two consecutive terms in an arithmetic series; it can be calculated by deducting any pair of terms starting with a and an+1.

Here,

First term, a = -4

Common difference, d = -2

nth term = 12

Now, let’s find 12th term

B(n) = -4 -2(n – 1)

B(12) = -4 – 2(12 – 1)

B(12) = -4 -2(11)

B(12) = -4 -22

B(12) = -26

That is, the 12th term in the sequence is -26.

Learn more about arithmetic sequence here:

brainly.com/question/11570734

#SPJ1

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Step-by-step explanation:

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stepladder [879]
There are 2 unknown terms in this problem 
the amount of cement the first team received is termed as 'x' hereafter 
the cement the second team received is termed as 'y'
the first team received 50 kg less, the 1st equation is as follows;

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however the first team had 1.5 times as much as second team had after three hours. 
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the amount first team had leftover was x - 450
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we can build the 2nd equation using this information

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rearrange the equation,
 
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add 1st and 2nd equations to eliminate x 
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Next, divide 1800 by 120.

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