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sergiy2304 [10]
3 years ago
8

If the sum of a number and one is doubled​, the result is three less than the number. Find the number

Mathematics
2 answers:
Sholpan [36]3 years ago
7 0
So if i am doing this correctly your answer should be this

<span>2(n+1) = n - 3

Hope This Helps!!!!
Have a Good Day!</span>
goblinko [34]3 years ago
3 0
Let the unknown number be x.

<span>sum of a number and one: x + 1
</span>
<span>sum of a number and one is doubled: 2(x + 1)
</span>
<span>three less than the number: x - 3

2(x + 1) = x - 3

2x + 2 = x - 3

x + 2 = -3

x = -5

The number is -5.
</span>
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The answer would be 10%
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Center ( 9,-8 ), passes through ( 19,22 )
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3 years ago
Identify the indicated sum for the geometric series.<br> S7 for 162 − 54 + 18 − 6 + .....
Ulleksa [173]

The indicated sum for the geometric series is 121.5

<h3>How to identify the indicated sum for the geometric series?</h3>

The series is given as:

162 − 54 + 18 − 6 + .....

Start by calculating the common ratio of the geometric series.

This is calculated using

r = -54/162

Evaluate

r = -1/3

The indicated sum for the geometric series is then calculated as:

S = a(1 - r^n)/1 - r

Substitute the known values in the above equation

S = 162(1 - (-1/3)^7)/1 + 1/3

Evaluate the exponent and the sum

S = 162(1 + 1/2187)/4/3

Evaluate the sum

S = 162(2188/2187)/4/3

Express as products

S = 162 * (2188/2187)* 3/4

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S = 121.5

Hence, the indicated sum for the geometric series is 121.5

Read more about geometric series at

brainly.com/question/24643676

#SPJ1

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2 years ago
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