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d1i1m1o1n [39]
3 years ago
14

Write the number twenty-three in stander form

Mathematics
2 answers:
kozerog [31]3 years ago
8 0

Answer:

23

Step-by-step explanation:


Phoenix [80]3 years ago
7 0

Answer:

2.3 × 10

Step-by-step explanation:

23 represented in standard form or scientific notation form is:

2.3 × 10^{1}

Simplifying gives;

2.3 × 10.

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The difference between two numbers is 20. their sum is 14.find the numbers
sladkih [1.3K]
Let the two numbers be x and y. The sum of x and y is 14 and the difference is 20. We can write a system of equations and solve:

x-y=20 \\
x+y=14 \\
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Then substitute x back into one of the equations to find y:

x+y=14 \\
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Write the sum using summation notation, assuming the suggested pattern continues.
Usimov [2.4K]

Answer:

Sum of the sequence will be 648

Step-by-step explanation:

The given sequence is representing an arithmetic sequence.

Because every successive term of the sequence is having a common difference d = -3 - (-9) = -3 + 9 = 6

3 - (-3) = 3 + 3 = 6

Since last term of the sequence is 81

Therefore, by the explicit formula of an arithmetic sequence we can find the number of terms of this sequence

T_{n}=a+(n-1)d

where a = first term of the sequence

d = common difference

n = number of terms

81 = -9 + 6(n - 1)

81 + 9 = 6(n - 1)

n - 1 = \frac{90}{6}=15

n = 15 + 1 = 16

Now we know sum of an arithmetic sequence is represented by

\sum_{n=1}^{n}(a_{n})=\frac{n}{2}(a_{1}+a_{n})

Now we have to find the sum of the given sequence

S_{16}=\frac{16}{2}[-9 + (16-1)6]

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              = 8×81

              = 648

Therefore, sum of the terms of the given sequence will be 648.

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Step-by-step explanation:

AAA are the correct answer.

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Answer:

-49 is the answer for the question

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