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Sav [38]
3 years ago
13

the only black pens and green pens in a box the ratio of a number of black pens in the box to the number of green pens in the bo

x is to 5 what fraction of pens are black
Mathematics
1 answer:
eduard3 years ago
4 0

Fraction of black pens = 2/ (2 + 5)  = 2/7  answer

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What is the common ratio between successive terms in the sequence?
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The number of times the value appears in the data set
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Find three consecutive odd integers where the sum of the two largest is seven less than three times the smallest.
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Answer:

<h3>              13, 15, 17</h3>

Step-by-step explanation:

x    - an integer  then  2x + 1 is an odd number  (the smallest one)

consecutive odd numbers increase by 2

so the next odd number (the middle number) is:

2x + 1 + 2 = 2x + 3

and the third (the largest) consecutive is:

2x + 3 + 2 = 2x + 5

the sum of the the two largest numbers is:

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3 times the smallest number is:  

3(2x + 1)  

the sum of the two largest is seven less than three times the smallest, so:

2x + 3 + 2x + 5 = 3(2x + 1) - 7

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   -6x       -6x

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   -8       -8

-2x  = -12

÷(-2)    ÷(-2)

  x = 6

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2x+3 = 2•6+3 = 15

2x+5 = 2•6+5 = 17

Check:

2x+3+2x+5 = 15+3+15+5 = 38

38+7 = 45

45÷3 = 15

5 0
3 years ago
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