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3 years ago

More help with math please. Thanks,

Mathematics

2 answers:

Dennis_Churaev [7]3 years ago

6 0

Triangles = 180 degrees. All you need to do is add up the other 2 and subtract it from 180 which will give you 118.

Elan Coil [88]3 years ago

5 0

Your Answer For X Is X=118

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What is the value of 6 in 3.651 A. Ones B. Tenths C. Tens D. Hundredths

kobusy [5.1K]

Hey there!

<h2>Explanation</h2>

So the first digit of the decimal is called ones. After the decimal, it starts with tenths, then hundredths, and at last thousandths. But you see 6 in the tenths place so now you have your answer.

<h2>Answer</h2>

Your answer is B. Tenths

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1/5 greater or less than 2/6

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1/5=0.2. 2/6=0.3. 2/6 is greater. Or 1/5 is less than.

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4 years ago

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Mandarinka [93]

k, n - integers

2k+1 - an odd integer

2n+1 - another odd integer

The product of them:

(2k + 1)(2n + 1) =

= 4kn + 2k + 2n + 1 =

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4 years ago

Find the nth term of the sequence 7,25,51,85,127

olya-2409 [2.1K]

Let a (n) denote the n-th term of the given sequence.

Check the forward differences, and denote the n-th difference by b (n). That is,

b (n) = a (n + 1) - a (n)

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b (1) = a (2) - a (1) = 25 - 7 = 18

b (2) = a (3) - a (2) = 51 - 25 = 26

b (3) = a (4) - a (3) = 85 - 51 = 34

b (4) = a (5) - a (4) = 127 - 85 = 42

Now consider this sequence of differences,

18, 26, 34, 42, …

and notice that the difference between consecutive terms in this sequence b is 8:

26 - 18 = 8

34 - 26 = 8

42 - 34 = 8

and so on. This means b is an arithmetic sequence, and in particular follows the rule

b (n) = 18 + 8 (n - 1) = 8n + 10

for n ≥ 1.

So we have

a (n + 1) - a (n) = 8n + 10

or, replacing n + 1 with n,

a (n) = a (n - 1) + 8 (n - 1) + 10

a (n) = a (n - 1) + 8n + 2

We can solve for a (n) by iteratively substituting:

a (n) = [a (n - 2) + 8 (n - 1) + 2] + 8n + 2

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and so on. The pattern should be clear; we end up with

a (n) = a (1) + 8 (n + (n - 1) + … + 3 + 2) + (n - 1)×2

The middle group is the sum,

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Answer:

all work is shown and pictured

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